Percentage MCQs
Showing 50 questions (Total: 1245)
If 8 men can do a job in 12 days, what is the percentage change in the number of days required to do the job if 2 men are released?
Correct Answer:
D: 33.33%
Explanation:
If 8 men can do a job in 12 days, what is the percentage change in the number of days required to do the job if 2 men are released? Correct Answer 33.33% Remaining men = 8 - 2 = 6 8 men can do the job in 12 days So, 6 men can do te job in 12×8/6 = 16 days Increase percentage in number of days = (16 - 12) / 12 × 100% = 33.33%
You can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent. Calculate the current price of one dozen of Mangoes.
Correct Answer:
C: 36
Explanation:
You can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent. Calculate the current price of one dozen of Mangoes. Correct Answer 36 For Tk.100 reduction in price Tk.20 For Tk.75. " " " (20 * 75)/100 Price of 5 mangoes is tk 15 " " 12 " " (15 * 12)/5 = Tk.36
per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk. 100, then what is the per day wage rate now?
Correct Answer:
D: 80
Explanation:
per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk. 100, then what is the per day wage rate now? Correct Answer 80 After 50% reduce New wage = 100 - (50/100) * 100 = Tk.50 After 60% increased New wage = 50 + 60/100 * 50 = Tk.80
Out of total profit, A gets 40% , B 25% , C 20% , D 10% and E 5% . A's profit is what percentage of that of B?
Correct Answer:
B: 160%
Explanation:
Out of total profit, A gets 40% , B 25% , C 20% , D 10% and E 5% . A's profit is what percentage of that of B? Correct Answer 160% Lets, A profit is x% of that of B so, 40% = x of 25 % 40/100 = x/100 of 25 /100 40/100 = (x×25) /(100×100) x × 25 = ( 40×100×100) /100 x = ( 4×100)/25 x = 160
per day wage rate of workers is reduced 50% due to economic slow down. After one year ,the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk.. 100, then what is the per da y wage rate Now?
Correct Answer:
D: 80
Explanation:
per day wage rate of workers is reduced 50% due to economic slow down. After one year ,the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk.. 100, then what is the per da y wage rate Now? Correct Answer 80 Per day wage rate before the decrease was Tk. 100 per day wage rate of workers is reduced 59%. So, wage rate is ( 100 - 50) = 50 After one year rate increased 60% = 50 + 50 of 60% = 50 + 50×.6 = 80
you can now buy 5 more Oranges with Tk. 75 due to reduction in rice by 20 percent Calculate the current price of one dozen of Oranges.
Correct Answer:
C: 36
Explanation:
you can now buy 5 more Oranges with Tk. 75 due to reduction in rice by 20 percent Calculate the current price of one dozen of Oranges. Correct Answer 36 Shortcut method cost/price = given % /100 × total tk /no of more less × no of products for the cost Cost = 20/100×75/5 ×12 = 36
If the length of a rectangle is increased by 20% and the width is decreased by 20%, the area is :
Correct Answer:
B: decreased by 4%
Explanation:
If the length of a rectangle is increased by 20% and the width is decreased by 20%, the area is : Correct Answer decreased by 4% Let's assume the length of the rectangle is L and the width is W.Then the original area of the rectangle = L x WAfter the increase in length by 20%, the new length = L + 0.2L = 1.2LAfter the decrease in width by 20%, the new width = W - 0.2W = 0.8WSo, the new area of the rectangle = (1.2L) x (0.8W) = 0.96LWTherefore, the new area of the rectangle is 96% of the original area.Answer: 96% of the original area.decreased by 4%
If the price of apple is Tk. 80.00 a kilogram, and the price triples every 6 months, how long will it be untill the price of apple is Tk. 6480.00 a kilogram?
Correct Answer:
B: 2 years
Explanation:
If the price of apple is Tk. 80.00 a kilogram, and the price triples every 6 months, how long will it be untill the price of apple is Tk. 6480.00 a kilogram? Correct Answer 2 years If the price of apple is Tk. 80.00 a kilogram, and the price triples every 6 monthsThen, every 6 months the price will be = 80 ×3= 240 After (6+6)=12 months it will be = 240×3 = 720After (12+6)=18 months it will be = 720×3= 2160After (18+6)=24 months it will be = 2160×3=6480So after 24 months or 2 years it Will be 6480 taka
An employer pays 3 workers X, Y and Z a total of Tk. 36,600.00 a week. X is paid 125% of the amount Y is paid and 80% of the amount Z is paid. How much does X make a week?
Correct Answer:
B: 12,000
Explanation:
An employer pays 3 workers X, Y and Z a total of Tk. 36,600.00 a week. X is paid 125% of the amount Y is paid and 80% of the amount Z is paid. How much does X make a week? Correct Answer 12,000 X = 125%Y X = 80%Z X = 125×Y100 X = 80×Z100 X = 5Y4 X = 4Z5 Y = 4X5 Z = 5X4 X + Y + Z = 36600 X + 4X5 + 5X4 = 36600 20X + 16X + 25X20 = 36600 X = 12000 (Ans.)
Three individuals contributed Tk. 8,000.00 each toward the puchase of a computer. If they bought the computer on sale for Tk. 19,500.00 plus 10 percent sales tax, how much money should be refunded to each individual?
Correct Answer:
B: Tk. 850
Explanation:
Three individuals contributed Tk. 8,000.00 each toward the puchase of a computer. If they bought the computer on sale for Tk. 19,500.00 plus 10 percent sales tax, how much money should be refunded to each individual? Correct Answer Tk. 850 Total contribution = 3 x 8000 = 24000 TK Cost of computer = 19500 + 10% of 19500 = 19500 + 1950 = 21450 TK. Excess contribution = 24000 - 21450 = 2550 TK. Refund to each = 2550/3 = 850 TK.
If the value of XYZ Company stock drops from Tk. 25 per share to Tk. 21 per share, What is the percent of the decrease?
Correct Answer:
D: 16%
Explanation:
If the value of XYZ Company stock drops from Tk. 25 per share to Tk. 21 per share, What is the percent of the decrease? Correct Answer 16% Percentage of decrease in share value = (25 - 21)/25×100% = 16%
B and C are points on the straight line AD, on which AB=BC=CD. What percent of AC is AD?
Correct Answer:
D: 150%
Explanation:
B and C are points on the straight line AD, on which AB=BC=CD. What percent of AC is AD? Correct Answer 150% Here, AB + BC + CD = AD or, AB + AB + AB = AD or, 3AB = AD Again, AB + BC = AC or, AB + AB = AC or, 2AB = AC Now, AD/AC = 3AB/(2AB) or, AD = 3/2×100% of AC = 150% of AC
In a shipment of 120 machine parts, 5 percent were defective. In a shipment of 80 machine parts, 10 percent were defective. For the two shipments combined, what percent of the machine parts were defective?
Correct Answer:
B: 7%
Explanation:
In a shipment of 120 machine parts, 5 percent were defective. In a shipment of 80 machine parts, 10 percent were defective. For the two shipments combined, what percent of the machine parts were defective? Correct Answer 7% Defective parts in the shipment of 120 = 5% of 120 = (5/100) ×120 = 6 Defective part in the shipment of 80 = 10% of 80 = (10/100) ×80 = 8 ∴ Total machine parts = 120 + 80 = 200 Total defective parts = 6 + 8 = 14 % of defective parts = {(14/200)×100}% = 7%
Out of a group of 80 applicants for a public service examination, 20 persons failed to appear for the first part of the test. What percent of the total applicants appeared for this part of the test?
Correct Answer:
D: 75
Explanation:
Out of a group of 80 applicants for a public service examination, 20 persons failed to appear for the first part of the test. What percent of the total applicants appeared for this part of the test? Correct Answer 75 Appeared applicants = 20/80×100% = 75%
A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last?
Correct Answer:
C: 15 days
Explanation:
A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last? Correct Answer 15 days ৩২০০ টাকায় ২০ জন ছাত্রের খাবার আছে = ৩০ দিনের৩২০০ টাকায় ১ জন ছাত্রের খাবার আছে = ৩০*২০ দিনের৩২০০ টাকায় ৩০ জন ছাত্রের খাবার আছে = 30×2030 দিনের২৪০০ টাকায় ৩০ জন ছাত্রের খাবার আছে = 30×20×240030×3200দিনের = ১৫ দিনের (উত্তর)
The population of a town was 160,000 three years ago. If it is increased by 3%, 2.2% and 5% respectively in the last three years, then the present population of the town is :
Correct Answer:
B: 177,366
A book had a catalogue price of Tk. 400. It was sold at a discount of 15% . If the book had a cost of Tk. 200, what was the percentage of profit?
Correct Answer:
D: 70
Explanation:
A book had a catalogue price of Tk. 400. It was sold at a discount of 15% . If the book had a cost of Tk. 200, what was the percentage of profit? Correct Answer 70 Selling Price = 400 - 400×15100 = 340tkCost Price = 200tkprofit = 340 - 200 = 140tkpercentage of profit = 140×100200 = 70 (Ans.)
If the length and width of a rectangular garden plot were each increased by 20 percent, what would be the percent increase in the area of the plot?
Correct Answer:
A: 44%
Explanation:
If the length and width of a rectangular garden plot were each increased by 20 percent, what would be the percent increase in the area of the plot? Correct Answer 44% Shortcut - 20 + 20 + (20*20/100) = 44% increased
If 18 is 15 percent of 30 percent of a certain number, what is the number?
Correct Answer:
A: 400
Explanation:
If 18 is 15 percent of 30 percent of a certain number, what is the number? Correct Answer 400 Let, the number = x = > x × 30% × 15% = 18 = > x = ( 18 × 100 × 100) /30×15 = 400
If the population of a certain country increases at the rate of one person every 15 second, by how many persons does the population increase in 20 minutes?
Correct Answer:
A: 80
Explanation:
If the population of a certain country increases at the rate of one person every 15 second, by how many persons does the population increase in 20 minutes? Correct Answer 80 Population increased in 15 sec = 1 Population increased in 60 sec or 1 min = 1×4 = 4 Population increased in 20 min = 4×20 = 80
A 10% monthly salary increase resulted in a Tk. 9,000 per year increase in salary for an employee. What was his monthly salary before the increase?
Correct Answer:
A: Tk. 7,500
Explanation:
A 10% monthly salary increase resulted in a Tk. 9,000 per year increase in salary for an employee. What was his monthly salary before the increase? Correct Answer Tk. 7,500 Yearly increase = 9000 tk Monthly increase = 9000/12 = 750 tk 10% of Salary is = 750 tk 100% of Salary is = (750×100)/10 = 7500 tk
you can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent . Calculate the current price of one dozen of Mangoes.
Correct Answer:
C: 36
Explanation:
you can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent . Calculate the current price of one dozen of Mangoes. Correct Answer 36 Let Previous price of a mango was tk x So, current price of a mango is x(80%) or tk 4x/5 ATO, 75/(4x/5) = 75/x + 5 = > 20x + 300 = 375 = > x = 15/4 So, the current price of dozen of mango is 12 x 4/5 x 15/4 or tk 36.
The organizers of a fair projected a 25 percent increase in attendance this year over that of last year, but attendance this year actually decreased by 20 percent . what percent of the projected attendance was the actual attendance?
Correct Answer:
C: 64%
Explanation:
The organizers of a fair projected a 25 percent increase in attendance this year over that of last year, but attendance this year actually decreased by 20 percent . what percent of the projected attendance was the actual attendance? Correct Answer 64% Let, last year present = 100 this year projected present = (100 + 25) = 125 this year Actual present = (100 - 20) = 80 so, the percentage = ((80/125)*100)% = 64%
A stock decreases in value by 20%. By what percentage must the stock price increase to reach its former value?
Correct Answer:
C: 25%
Explanation:
A stock decreases in value by 20%. By what percentage must the stock price increase to reach its former value? Correct Answer 25% Let the initial value be A. Decreased value = A - 20% of A = A - 0.2A = 0.8A Increment required to reach initial value = (A - 0.8A)/(0.8A)×100% = 25%
The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of-
Correct Answer:
B: 19
Explanation:
The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of- Correct Answer 19 Let the price of the TV set be S. Price after 10% discount = S - 10% of S = 0.9S Price after another 10% successive discount = 0.9 - 10% of 0.9S = 0.09S = 0.81S Actual discount = (S - 0.81S)/S×100% = 19%
If 40% of all women are voters and 52% of the population is woman, what percent of the population are women voters?
Correct Answer:
A: 20.8
Explanation:
If 40% of all women are voters and 52% of the population is woman, what percent of the population are women voters? Correct Answer 20.8 মনে করি, মোট জনসংখ্যা = 100 জন Women দের সংখ্যা = 52 জন Women দের ভোটার সংখ্যা = 52×(40/100) = 20.8
In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes?
Correct Answer:
C: 45
Explanation:
In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes? Correct Answer 45 Percentage of people having atleast one of the qualities = 40% + 25% - 10% = 55% Percentage of people having neither of the qualities = 100% - 55% = 45%
A class of 50 girls and 70 boys sponsored a party. If 40% of the girls and 50% of the boys attended the party, approximately what percent of the class attended?
Correct Answer:
D: 46
Explanation:
A class of 50 girls and 70 boys sponsored a party. If 40% of the girls and 50% of the boys attended the party, approximately what percent of the class attended? Correct Answer 46 First, we need to find out 40% of the 50 girls. That is 50 x 0.4 = 20 girls. Next, we need to find out 50% of the 70 boys. That is 70 x 0.5 = 35 boys. Therefore, 20 + 35 = 55 people attended. In total there were 50 + 70 = 120 people. So the percent would be 55/120 = 11/24 ≈ 45.83% ≈ 46%.
একটি আয়তাকার ক্ষেত্রের দৈর্ঘ্য ২০% বৃদ্ধি ও প্রস্থ ১০% হ্রাস করা হলে, ক্ষেত্রফলের শতকরা কত পরিবর্তন হবে?
Correct Answer:
গ: ৮% বৃদ্ধি
Explanation:
একটি আয়তাকার ক্ষেত্রের দৈর্ঘ্য ২০% বৃদ্ধি ও প্রস্থ ১০% হ্রাস করা হলে, ক্ষেত্রফলের শতকরা কত পরিবর্তন হবে? সঠিক উত্তর ৮% বৃদ্ধি S.T: A + B + (AB/100) = 20 + ( - 10) + ((20*( - 10))/100 = 8% ans
একটি DVD-এর দামের উপর ১০% বাট্টা দেয়া হয় এবং পরবর্তী হ্রাসকৃত দামের উপর পুনরায় ১০% বাট্টা দেয়া হয়। মূল দামের উপর মোট বাট্টার পরিমাণ হলো :
Correct Answer:
খ: ১৯%
Explanation:
একটি DVD-এর দামের উপর ১০% বাট্টা দেয়া হয় এবং পরবর্তী হ্রাসকৃত দামের উপর পুনরায় ১০% বাট্টা দেয়া হয়। মূল দামের উপর মোট বাট্টার পরিমাণ হলো : সঠিক উত্তর ১৯% মনে করি,একটি DVD -এর দাম=১০০ টাকা১০০ টাকার ১০% =(১০০ × ১০)/১০০= ১০ টাকাবাট্টা দেয়ার পর DVD- টির দাম=(১০০-১০) টাকা বা, ৯০ টাকাপরবর্তী হ্রাসকৃত দামের উপর পুনরায় ১০% বাট্টা দেয়া হয়, অর্থাৎ৯০ টাকার ১০% =(৯০ × ১০)/১০০= ৯ টাকা মূল দামের উপর মোট বাট্টার পরিমাণ হলো=(১০+৯) টাকা বা, ১৯ টাকাঅতএব, মূল দামের উপর মোট বাট্টার পরিমাণ শতকরা ১৯ টাকা।উত্তর: ১৯%।
একটি শেয়ারের দাম গতকালকে ২০% কমেছে এবং আজকে তা বেড়েছে ৩০%। মোট বৃদ্ধি বা হ্রাসের হার কত?
Correct Answer:
খ: ৪% বৃদ্ধি
Explanation:
একটি শেয়ারের দাম গতকালকে ২০% কমেছে এবং আজকে তা বেড়েছে ৩০%। মোট বৃদ্ধি বা হ্রাসের হার কত? সঠিক উত্তর ৪% বৃদ্ধি মোট বৃদ্ধি= -20+30-(20×30)/100=4%
শহর ‘ক’ এর ৬ মাইল পূর্বে শহর ‘খ’ অবস্থিত। শহর ‘খ’ এর ৮ মাইল উত্তরে শহর ‘গ’ অবস্থিত। শহর ‘গ’ এর ১২ মাইল পূর্বে শহর ’ঘ’ এর ১৬ মাইল উত্তরে শহর ‘ঙ’ অবস্থিত। শহর ‘ক’ থেকে ‘ঙ’ এর দূরত্ব কত?
Correct Answer:
গ: ৩০ মাইল
Explanation:
শহর ‘ক’ এর ৬ মাইল পূর্বে শহর ‘খ’ অবস্থিত। শহর ‘খ’ এর ৮ মাইল উত্তরে শহর ‘গ’ অবস্থিত। শহর ‘গ’ এর ১২ মাইল পূর্বে শহর ’ঘ’ এর ১৬ মাইল উত্তরে শহর ‘ঙ’ অবস্থিত। শহর ‘ক’ থেকে ‘ঙ’ এর দূরত্ব কত? সঠিক উত্তর ৩০ মাইল চিত্র হতে আমরা দেখতে পাই ক খ ও গ একটি সমকোণী ত্রিভুজ উৎপন্ন করে এবং গ ঘ ও ঙ একটি সমকোণী ত্রিভুজ উৎপন্ন করেঅতএব, ক ও ঙ এর মধ্যবর্তী দূরত্ব =62+82+122+162=30 mile
মনে করেন প্রতি বাসস্টপেজে বাস থেকে অর্ধেক বাসযাত্রী নামে এবং অতিরিক্ত কোনো বাসযাত্রী উঠে না। যদি চতুর্থ বাসস্টপেজে শেষ বাসযাত্রীর পূর্ববর্তী বাসযাত্রী বাস থেকে নামে, তাহলে বাসে কতজন যাত্রী ছিল?
Correct Answer:
ঘ: ১৬
Explanation:
মনে করেন প্রতি বাসস্টপেজে বাস থেকে অর্ধেক বাসযাত্রী নামে এবং অতিরিক্ত কোনো বাসযাত্রী উঠে না। যদি চতুর্থ বাসস্টপেজে শেষ বাসযাত্রীর পূর্ববর্তী বাসযাত্রী বাস থেকে নামে, তাহলে বাসে কতজন যাত্রী ছিল? সঠিক উত্তর ১৬ ধরুন শুরুতে বাসে N যাত্রী ছিল।প্রথম স্টপে, তাদের অর্ধেক (অর্থাৎ N/2) বাস থেকে নেমে যায় এবং বাকি অর্ধেক (এছাড়াও N/2) বাসে থাকে।দ্বিতীয় স্টপে, বাকি যাত্রীদের অর্ধেক (অর্থাৎ N/4, যা N/2-এর অর্ধেক) বাস থেকে নেমে যায় এবং বাকি অর্ধেক (এছাড়াও N/4) বাসে থাকে।একইভাবে, তৃতীয় স্টপে, বাকি যাত্রীদের অর্ধেক (অর্থাৎ N/8, যা N/4-এর অর্ধেক) বাস থেকে নেমে যায় এবং বাকি অর্ধেক (এছাড়াও N/8) বাসে থাকে।এবং চতুর্থ স্টপে, বাকি যাত্রীদের অর্ধেক (অর্থাৎ N/16, যা N/8-এর অর্ধেক) বাস থেকে নেমে যায়, পরের-থেকে-শেষের ব্যক্তিকে বেরিয়ে যাওয়ার জন্য রেখে যায়, এবং শেষ ব্যক্তিটি কেবলমাত্র অবশিষ্ট থাকে। . বাসে.অতএব, আমাদের কাছে N/16 = 1 রয়েছে (যেহেতু বাসে কেবল একজন ব্যক্তি বাকি ছিল), যার অর্থ N = 16।তাই বাসে প্রাথমিক যাত্রী সংখ্যা ছিল ১৬ জন।
একটি নতুন মেশিনের মূল্য ১,২০,০০০ টাকা। প্রথম বছর পর তার মূল্য ২০% হ্রাস পেল, দ্বিতীয় বছর পর তার মূল্য আরও ১০% হ্রাস পেল। দ্বিতীয় বছর মেশিনটির মূল্য কত হলো?
Correct Answer:
ঘ: ৮৬,৪০০ টাকা
Explanation:
একটি নতুন মেশিনের মূল্য ১,২০,০০০ টাকা। প্রথম বছর পর তার মূল্য ২০% হ্রাস পেল, দ্বিতীয় বছর পর তার মূল্য আরও ১০% হ্রাস পেল। দ্বিতীয় বছর মেশিনটির মূল্য কত হলো? সঠিক উত্তর ৮৬,৪০০ টাকা নোলক কবিতাটি সোনালি কাবিন কাব্যের অন্তর্ভুক্ত। কাব্যটির রচয়িতা আল মাহমুদ
In redesigning a cold storage, the length is increased by 30%, the breadth is increased by 50% and the height is reduced by 20%. What is the net increase in the volume of the redesigned cold storage compared to the previous design?
Correct Answer:
B: 56%
Explanation:
In redesigning a cold storage, the length is increased by 30%, the breadth is increased by 50% and the height is reduced by 20%. What is the net increase in the volume of the redesigned cold storage compared to the previous design? Correct Answer 56% Let the initial length, breadth and height be L, B and H respectively. Then, initial volume, V = L×B×H New length = L + 30% of L = L + 30/100 of L = 1.3L New breadth = B + 50% of B = 1.5B Height = H - 20% of H = 0.8H So, new volume, V' = 1.3L × 1.5B × 0.8H = 1.56 (L×B×H) = 1.56V Net increase in volume = (1.56V - V) / V ×100% = 56%
Per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk 100, then what is the per day wage rate now?
Correct Answer:
D: 80
Explanation:
Per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk 100, then what is the per day wage rate now? Correct Answer 80 before the decrease, the wage rate = 100 tkdue to economic slowdown, after decrease the wage rate =100-100×50100 = 100 -50 = 50after increase(after one year), the wage rate now = 50 + 50×60100 = 50 + 30 = 80 tk (Ans.)
কামালের আয় রফিকের আয় অপেক্ষা ১৬ টাকা বেশি হলে রফিকের আয় কামালের আয় অপেক্ষা শতকরা কত কম?
Correct Answer:
ক: ১৩.৮%
Explanation:
কামালের আয় রফিকের আয় অপেক্ষা ১৬ টাকা বেশি হলে রফিকের আয় কামালের আয় অপেক্ষা শতকরা কত কম? সঠিক উত্তর ১৩.৮% ব্যাখাঃ ধরি, রফিকের আয় ১০০ টাকা কামালের আয় = ১০০ + ১৬ = ১১৬ টাকা কামালের আয় ১১৬ টাকা হলে রফিকের আয় কম ১৬ টাকা কামালের আয় ১ টাকা হলে রফিকের আয় কম ১৬/১১৬ টাকা কামালের আয় ১০০ টাকা হলে রফিকের আয় কম = (১৬ × ১০০)/ ১১৬ টাকা = ১৩.৮ টাকা বা ১৩.৮%
একটি গ্রামের ৪০% লোক ডায়াবেটিসে আক্রান্ত এবং ২৫% লোক উচ্চ রক্তচাপে আক্রান্ত। যদি ১০% লোক উভয় রোগে আক্রান্ত হয়, কত শতাংশ লোক উভয় রোগের কোনোটিতেই আক্রান্ত নয়?
Correct Answer:
ঘ: ৪৫%
Explanation:
একটি গ্রামের ৪০% লোক ডায়াবেটিসে আক্রান্ত এবং ২৫% লোক উচ্চ রক্তচাপে আক্রান্ত। যদি ১০% লোক উভয় রোগে আক্রান্ত হয়, কত শতাংশ লোক উভয় রোগের কোনোটিতেই আক্রান্ত নয়? সঠিক উত্তর ৪৫% শুধু ডায়াবেটিসে আক্রান্ত = ৪০ - ১০ = ৩০%শুধু উচ্চ রক্তচাপে আক্রান্ত = ২৫ - ১০ = ১৫%শুধু ডায়াবেটিসে বা উচ্চ রক্তচাপে বা উভয় রোগে আক্রান্ত = ৩০+১৫+১০ = ৫৫%উভয় রোগের কোনোটাতেই আক্রান্ত নয় = (১০০ - ৫৫)% = ৪৫% (উত্তর)
Out of total profit, A gets 40%, B 25%, C 20%, D 10%, and E 5%. What percentage of A's profit is that of B?
Correct Answer:
B: 160%
Explanation:
Out of total profit, A gets 40%, B 25%, C 20%, D 10%, and E 5%. What percentage of A's profit is that of B? Correct Answer 160% Here, A : B : C : D : E = 40 : 25 : 20 : 10 : 5 So, A : B = 40 : 25 or, A / B = 40 / 25 or, A = 40/25×100% of B = 160% of B
30% of 80 is what percent of 24?
Correct Answer:
D: 100
Explanation:
30% of 80 is what percent of 24? Correct Answer 100 x% of 24 = 30% of 80 So, x = 30 x 80 / 24 = 100.
A restaurant meal costs Tk. 35.50 and there was no tax. If the tip was more than 10 percent but less than 15 percent of the cost of meal, then the total amount paid must have been between --
Correct Answer:
B: Tk. 39 and Tk. 41
In a class of 80 students, 25% are girls, If 10% of the boys and 20% of the girls attended a picnic, what percent of the class did attent?
Correct Answer:
C: 12.5%
Explanation:
In a class of 80 students, 25% are girls, If 10% of the boys and 20% of the girls attended a picnic, what percent of the class did attent? Correct Answer 12.5% Percentage of class attending picnic = 20% of 25% + 10% of 75% = 5% + 7.5% = 12.5%
Increasing the original price of an article by 15 percent and then increasing the new price by 15 percent is equivalent to increasing the original price by ---
Correct Answer:
A: 32.25%
Explanation:
Increasing the original price of an article by 15 percent and then increasing the new price by 15 percent is equivalent to increasing the original price by --- Correct Answer 32.25% required number = 15 + 15 + 15×15100 = 15 + 15+ 2.25 = 32.25 (Ans)
একজন লোক একটি নির্দিষ্ট স্থান A থেকে যাত্রা শুরু করে 12 কিলোমিটার উত্তর দিকে গেল এবং সেখান থেকে 5 কিলোমিটার পূর্ব দিকে গেল। যাত্রা শেষে সে A থেকে কত দূরে থাকবে?
Correct Answer:
ক: ১৩ কিমি
Explanation:
একজন লোক একটি নির্দিষ্ট স্থান A থেকে যাত্রা শুরু করে 12 কিলোমিটার উত্তর দিকে গেল এবং সেখান থেকে 5 কিলোমিটার পূর্ব দিকে গেল। যাত্রা শেষে সে A থেকে কত দূরে থাকবে? সঠিক উত্তর ১৩ কিমি ব্যাখাঃ মনে করি, লোকটি A বিন্দু থেকে ১২ কিমি উত্তরে B বিন্দুতে যাওয়ার পর ঠিক পূর্বদিকে ৫ কিমি গিয়ে C বিন্দুতে পৌছায়। এক্ষেত্রে ABC সমকোণী ত্রিভুজ উৎপন্ন করে। সমকোণী ত্রিভুজের বাহুর অনুপাত হচ্ছে ৫ঃ১২ঃ১৩। সুতরাং AC। এর দূরুত্ব হবে ১৩ কিমি। বি:দ্র: সমকোণী ত্রিভুজ আঁকতে হবে
Arif spends 1/10 of his salary for clothing, 1/3 for food, and 1/5 for other expenses. What percentage of his salary can Arif save?
Correct Answer:
A: 36.66%
Explanation:
Arif spends 1/10 of his salary for clothing, 1/3 for food, and 1/5 for other expenses. What percentage of his salary can Arif save? Correct Answer 36.66% Savings = 1 - (1/10 + 1/3 + 1/5) = 1 - (3 + 10 + 6)/30 = 1 - 19/30 = 11/30 = 36.66%
A union contract specifies a 6 percent salary increase plus a Tk. 450 bonus for each employee. For a certain employee, this is equivalent to 8 percent salary increase. What was this employee's salary before the new contract?
Correct Answer:
B: Tk. 22,500
Explanation:
A union contract specifies a 6 percent salary increase plus a Tk. 450 bonus for each employee. For a certain employee, this is equivalent to 8 percent salary increase. What was this employee's salary before the new contract? Correct Answer Tk. 22,500 Suppose, employee's salary before the new contract was = Xas per condition, 6% salary increase + 450 = 8% salary increase 8% salary increase - 6% salary increase = 450 2% salary increase = 450 2% of X = 450 2X/100 = 450 X = 22500So, Employee's salary before the new contract was = 22500 tk (Ans.)
In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of these are men, what percent of the non-unionized workers are women?
Correct Answer:
A: 90%
Explanation:
In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of these are men, what percent of the non-unionized workers are women? Correct Answer 90% Let X% of the non - unionized employees be men. Percentage of non - unionized employees = 100% - 60% = 40% Percentage of unionized men employees = 70% of 60% = 42% Now, % unionized men employees + % of non - unionized men employees = 46% or, 42% + X% of 40% = 46% or, X% of 40% = 46% - 42% = 4% or, X/100 = 4/40 So, X = 1/10×100 = 10 So, percentage of non - unionized women employees = 100% - 10% = 90%
The average age of 32 students is 10 years. If the teacher's age is also included, the average age increases by one year. What is the age of the teacher?
Correct Answer:
A: 43 Years
Explanation:
The average age of 32 students is 10 years. If the teacher's age is also included, the average age increases by one year. What is the age of the teacher? Correct Answer 43 Years Given,the average age of 32 students is 10years∴ total age = 32×10 = 320 yearsif teacher age is included then average be 11 yearstotal age including teacher = 11×33 = 363 yearsteachers age = 363 - 320 = 43 years (ans)
Out of a group of 80 applicants for a public service examination, 20 persons failed to appear for the first part of the test. What percent of the total applicants appeared for this part of the test ?
Correct Answer:
D: 75%
Explanation:
Out of a group of 80 applicants for a public service examination, 20 persons failed to appear for the first part of the test. What percent of the total applicants appeared for this part of the test ? Correct Answer 75% Total Students = 80 personFailed = 20 personAppeared = 80-20 = 60 person Percentage = 60×10080 = 75% (Ans)
B and C are points on straight line AD, on which AB=BC=CD. What percent of AC is AD ?
Correct Answer:
D: 150%
Explanation:
B and C are points on straight line AD, on which AB=BC=CD. What percent of AC is AD ? Correct Answer 150% A-----B-----C-----DLet, AB=BC=CD=xAC = AB + BC = x+x = 2xAD = AB + BC+CD = x+x+x = 3x let, AC * P% = AD(2x * P)/100 = 3xP = 150 % (Ans)