Explanation:

মার্চ মাসের দৈনিক বৃষ্টিপাতির গড় ০.৬৫ সেমি ছিল। ঐ মাসের বৃষ্টিপাতের পরিমাণ কত? সঠিক উত্তর ২০.১৫ সেমি মনে করি, মার্চ মাসে মোট বৃষ্টি পাতের পরিমান = x মার্চ  মাস যেহেতু 31 দিনে সেহেতু প্রশ্নমতে, গড় বৃষ্টিপাত = x31= 0.65বা, x = 31×0.65 = 20.15 মিটার উত্তর : ২০.১৫

Explanation:

২০২০ সালের ফেব্রুয়ারি মাসের গড় বৃষ্টিপাত ছিল ০.৭৫ মি.মি । ঐ মাসের মোট বৃষ্টিপাত কত? সঠিক উত্তর ২১.৭৫ মি.মি 2020 সালের ফেব্রুয়ারি মাস ছিল 29 দিনেযদি 29 দিনের গড় বৃষ্টিপাত 0.75 মি.মি হয় তবে 29 দিনের মোট বৃষ্টিপাত = 29 x 0.75 মি.মি = 21.75 মি.মি

Explanation:

A student obtained 60, 75 and 85 marks respectively in 3 monthly examinations in physics and 95 marks in the final examination. The 3 monthly examinations are of equal weightage whereas the final examination is weighted . What is his average mark physics? Correct Answer 82 Correct option is C)We have,x1 ​= 60 x2 ​=75x3​ = 85 x4 ​= 95 w1​ = 1w2 ​= 1 w3​ = 1 and    w4 ​= 2∴ xw¯=w1x1+w2x2+w3x3+ w4x4​​w1+w2+w3+w4​⇒ xw¯=(1×60)+(1×75)+(1×85)+ (2×95)​​1+1+1+2​⇒ xw¯=410​​5∴ xw¯=82

Explanation:

The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first one is 18 greater than the actual number and the second number added is 13 instead of 33. Find the correct average- Correct Answer 40.4 According to question, Sum = (40.2 × 10 - 18 + 33 - 13) = 404Correct Average = 404/10 = 40.4

Explanation:

৭, ১২, ১৭, ৩, ১১, ৬, ১, ৩ সংখ্যাগুলোর গড় কত? সঠিক উত্তর ৯ অঙ্কের উওরটি ভূল,  সঠিক উওর  হবে 7.5

Explanation:

The average temperature for the first 4- days of a week is 40.2-degree Celcius and that of the last 4 days is 41.3-degree Celcius If the average temperature for the whole week is 40.6-degree Celcius then the temperature on the fourth day is- Correct Answer 41.8 Degree Celcius Temperature on the fourth day= [(40.2 × 4 + 41.3 × 4) - (40.6 × 7)]° C= 41.8° C

Explanation:

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, then the present age of B is Correct Answer 39 years Let, B's present age is x year & 10 years ago he was (x-10) After 10 years, A= 2((x-10),  B= (x+10)Now, 2(x+10)-(x+10)=9Or, x=39 years.

Explanation:

৯টি সংখ্যার যোগফল ৫৩০। প্রথম ৫টির গড় ৫৬ এবং শেষের ৫টির গড় ৬২ হলে পঞ্চম সংখ্যাটি কত? সঠিক উত্তর ৬০ প্রথম পাঁচটির গড় গুণ করলে হয় ৫৬ × ৫ = ২৮০দ্বিতীয় পাঁচটির গর গুণ করলে হয় ৬২× ৫ = ৩১০২৮০+৩১০ = ৫৯০৫৯০ - ৫৩০ = ৬০তাহলে উত্তর ৬০

Explanation:

এক ব্যক্তি ঘন্টায় ৪০ কি. মি. বেগে ২ ঘন্টা এবং ঘন্টায় ৬০ কি.মি. বেগে আরো ২ ঘন্টা গাড়ি চালালেন। তাঁর গাড়ির গড় গতিবেগ কত? সঠিক উত্তর ৫০ কিমি/ঘন্টা (2*40=80)+(60*2=120)120+80=200200/4=50

Explanation:

৬, ৮, ১০ এর গাণিতিক গড়; ৭, ৯ ও কোন সংখ্যার গাণিতিক গড়ের সমান? সঠিক উত্তর ৮ এখানে, ৬ + ৮ + ১০/৩ = ২৪/৩ = ৮ হয় আবার, ৭ + ৯ + ৮/৩ = ২৪/৩ = ৮ হয় অথএব, ৭ এবং ৯ এর সাথে ৮ যোগ করলেই দুইটার গড় সমান হয় তাই সংখ্যটি ৮ হবে। আশা করি বুঝতে পারছেন ধন্যবাদ

Explanation:

Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z? Correct Answer 81.5 According to question,(i) (83x + 76y)/( x + y )​=79⇒ x = 43y​(ii) (76y + 85z)/(y + z)​ = 81z = 45y​Average of all 3 = (83x + 76y + 85z​)/(x + y + z)​=81.5

Explanation:

Salim gets grades of 79, 83, 86 and 89 on four math tests . What grade must he get on his fifth test to average 85 ? Correct Answer 86 Let,fifth test grade is x,So average, 79+83+86+89+x=85*5=>337+x=425So, x= 88

Explanation:

১ থেকে ১০০ পর্যন্ত সংখ্যাগুলোর গড় কত? সঠিক উত্তর ৫০.৫০ ১ থেকে ১০০ পর্যন্ত সংখ্যাগুলোর গড় = (প্রথমপদ + শেষপদ)× পদসংখ্যা / ২ × পদসংখ্যা = (১ + ১০০)×১০০ / ২ × ১০০ = ৫০.৫০

Explanation:

১০টি সংখ্যার যোগফল ৪৬২। এদের প্রথম ৪টির গড় ৫০ এবং শেষ ৫টির গড় ৪০ হলে পঞ্চম সংখ্যাটি কত? সঠিক উত্তর ৬২ প্রথম ৪ টি সংখ্যার সমষ্টি = ৪×৫০ = ২০০ শেষ ৫ টি সংখ্যার সমষ্টি = ৫×৪০ = ২০০ মোট = ২০০ + ২০০ = ৪০০ সুতরাং, পঞ্চম সংখ্যাটি = ৪৬২ - ৪০০ = ৬২

Explanation:

Sum of 10 integer is 462. The average of first 4 number is 52 and the average of last 5 number is 38. What is the fifth number ? Correct Answer 64 Q: Sum of 10 integer is 462. The average of first 4 number is 52 and the average of last 5 number is 38. What is the fifth number ? Sum of first 4 number = 4 X 52 = 208Sum of last 5 number = 5 X 38 = 190So, sum of 9 number = (208 + 190) = 398So, the 5th number = (462 - 398) = 64 (Ans:)

Explanation:

The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y=? Correct Answer 80 20 + 70 + x = 3 × 40 বা, x = 30 20 + 70 + 30 + y = 200 বা, y = 80

Explanation:

If Tk. 4500 was invested in a share when the price per share was Tk. 90 and Tk. 30,000 was invested when the price per share was Tk. 60, what was the average price per share prchased? Correct Answer Tk. 80 Total number of share = 4500/90 + 30000/60 = 50 + 500 = 550 Average price per share = ( 4, 500 + 30, 000)/550 = Tk.62.73

Explanation:

The average of x and y is 40 and that of y and z is 35. What is the value of x-z? Correct Answer 5 Total x & y = 80 Total y & z = 70 ( x + y) - ( y + z) = 80 - 70 x - z = 10

Explanation:

রাজশাহী থেকে খুলনার দূরত্ব ২৮২ কিলোমটার। একটি বাস ৭ ঘন্টায় খুলনা থেকে রাজশাহী চলে আসলো । পথে বাসটি ১ ঘন্টা যাত্রাবিরতি নেয়। বাসটির গড় গতিবেগ কত কি.মি/ঘন্টা? সঠিক উত্তর ৪২ মোট সময় নেয় ৭ ঘন্টা যাত্রা বিরতি নেয় ১ ঘন্টা নিট সময় নেয় = ( ৭ - ১) = ৬ ঘন্টা মোট দূরুত্ব ২৮২ কিলোমিটার গড় গতিবেগ = ২৮২ / ৬ কিমি/ঘন্টা = ৪৭ কিমি/ঘন্টা

Explanation:

৬, ৮, ১০ এর গাণিতিক গড়; ৭, ৯ এবং কোন সংখ্যার গাণিতিক গড়ের সমান হবে? সঠিক উত্তর ৮ ৬, ৮, ১০ এর গাণিতিক গড় = ২৪/৩ = ৮প্রশ্নমতে, (৭+৯+x)/৩ = ৮∴ x = ৮ (উঃ)

Explanation:

At a certain high school, the respective weights for the following subjects are : General Math 3, Bangla 3, History 2, Science 2 and Art 1. What is a student's average whose marks were the following : Geometry 89, Bangla Literature 92, History 94, Biology 81, and Sculpture 85? Correct Answer 88.9 ATQ, the average = (3*89 + 3*92 + 2*94 + 2*81 + 85)/(3 + 3 + 2 + 2 + 1)             = ( 3*181 + 2*175 + 85)/11             = 978/11             = 88.9 (ans)

Explanation:

At 9:00 a. m. the train Surmal left station and two hours later the train. Titas left the same station on a parallel track in the same direction. If Surma averaged 60 kilometers per hour and Titas averaged 75 kilometers per hour, at what time did Titas pass Surma? Correct Answer 7:00 p.m. From given data, 60(x) = 75(x - 2) , x is total time taken 60x = 75x - 150 15x = 150 x = 10 so total time taken is 10 hrs i.e at 7pm

Explanation:

Your company has an advertisement budget of BDT 50 million per quarter. Accounts show that during the first three quarters the company has spent BDT 10, 15, and 20 million respectively. How much should the company spend during the fourth quarter in order to maintain the average budget allocation? Correct Answer 155 million Total budget for a year = 4 x 50 = 200 million Budget spent in the first 3 quarters = 10 + 15 + 20 = 45 million Remaining budget to spent in the fourth quarter = 200 - 45 =  155 million

Explanation:

On a trip of 200 miles, a man travels at the rate of 40 miles per hour for the first 100 miles. For the rest of the trip, he travels at the rate of 55 miles per hour . What is his average speed, in miles per hour, for the total trip ? Correct Answer 400/9 Total time spent = 100/40 + 100/55 = 5/2 + 20/11 = 95/22 hours Average speed = 200 / (95/22) = 200 x 22 / 95 =   880/19 miles per hour

Explanation:

Find the average of all whole numbers between 1 and 100 that end in 3 . Correct Answer 44 The numbers are 3, 13, 23.33.......93 So difference between each number is same. This series in AP. The avarage formula for AP is (first + last term)/2 Therefore the answer is (3 + 93)/2 = 48.

Explanation:

A college has raised 75% of the amount it needs for a new building by receiving an average donation of $60 from the people already solicited. The people already solicited represent 60% of the people the college will ask for donation. If the college is to raise exactly the amount needed for the new building, how much must the remaining people donate per person? Correct Answer $ 30 Let the required donation per persion be D. People remaining to be solicited = 100 - 60 = 40% Funds remaining to receive = 100 - 75 = 25% ATQ,   (D x 40%) / ($60 x 60%) = 25% / 75% or,  D = 25% x ($60 x 60%) / (75% x 40%) = $30

Explanation:

In 1980, there were , on the average 10 deaths at birth (infant mortality) per 10,000 population. By 1990 , there were 8.5 and by 2000, 7.0 Today there were 5.5 deaths at birth per 10,000 population , and it is anticipated that the downward trend will continue.Each of following , if true, would help to account for this trend EXCEPT Correct Answer Sanitary conditions have improved. same as above

Explanation:

The average (arithmetic mean ) of x and y is 40 . If z=10 , what is the average of x, y and z? Correct Answer 35 Here,  x + y = 40 x 2 = 80 x + y + z = 80 + 10 = 90 So, average of x, y & z = 90 / 3 =  30

Explanation:

The average age of the father and two sons is 16 years and 7 months. If the mother is 14 years and 4 months and same two sons is 12 years and 7 months. If the mother is 24 years and 4 months old , then what is the age difference between the father and the mother ? Correct Answer 11 years and 3 months ‘is’ should be replaced by ‘will be’.

Explanation:

If the average (arithmetic mean) of 5 consecutive numbers is 12 , what is the sum if the least and the greatest of the integers? Correct Answer 10 Let the consecutive integers be n, (n + 1), (n + 2), (n + 3) and (n + 4) respectively. So,  n + (n + 1) + (n + 2) + (n + 3) + (n + 4) = 12 x 5 or,  5n + 10 = 60 or,  5n = 60 - 10 or,  n = 50 / 5 = 10. So, the least number is 10 and the greatest number is (10 + 4 = 14). Their sum = 10 + 14 = 24.

Explanation:

The average daily income of Mr. A and Mr. B is Tk. 350 , of Mr. B and Mr. C is Tk. 365 and of Mr. A and Mr. c is tk. 340 . what is the weekly income of Mr. A if he works 5 days in a week? Correct Answer Tk. 1,875 Let their daily incomes be A, B and C respectively. Now, A + B = 2 x 350 or,  A + B = 700 - - - - - - - - (i) Again,  B + C = 2 x 365 or,  B + C = 730 - - - - - - - - - - (ii) Again,  A + C = 2 x 340 or,  A + C = 680 - - - - - - - - - - (iii) {(i) + (ii) + (iii)}>>>   A + B + B + C + A + C = 700 + 730 + 680 or,  2(A + B + C) = 2110 or,   A + B + C = 1055 or,  A + 730 = 1055 or,  A = 1055 - 730 or,  A = 325 TK So, the weekly income of A = 5 x 325 = 1625 TK

Explanation:

The electric company charges Tk. 0.30 per kilowatt-hour (KWH). Rahim used 2800 KWH in April, 3200 KWH in May, and 3600 KWH in June. What was his average cost of electricity for the 3 months? Correct Answer Tk. 72 Average usage = (2800 + 3200 + 3600) / 3 = 9600 / 3 = 3200 kwh So, average cost = 3200 x 0.3 = 960 TK

Explanation:

Rafia ran from her house to schoolat an average speed of 6 miles per hour and returned along the same route at an average speed of 4 miles per hour . If it took her one hour in total to run to the school and come back, how many minutes did it take her to run from her house to school? Correct Answer 16 Let, Distance = D we know that , T = D/s Here, T = time, D = ddistance, S = speed According to question, D/6 + D/4 = 1 (2D + 3D) /12 = 1 D = 12/5 6 mile go 1 hours or 60 minutes 1 mile go 60/6 minutes 12/5 mile go ( 60×12)/ ( 6×5) = 24 minutes ( correct answer)

Explanation:

A school has raised 75% of the amount it needs for a new building by receiving an average donation of Tk 60 from the people already solicited. The people already solicited represent 60% of the people the college will ask for donations If the college is to raise exactly the amount needed for the new building , how much must the remaining people donate per person? . Correct Answer Tk 30 Let Total people = 100 60% people of total people = 60 They donate amount = 60×60 = 3600 Remaining people = 100 - 60 = 40 And remaining amount = ( 3600×100) 75 - 3600 = 4800 - 3600 = 1200 They donate per person = 1200/40 = 30Tk.

Explanation:

At 10 a.m. two trains started travelling toward each other from stations 287 miles apart. They passed each other at 1:30 pm the same day. They average speed of the faster train exceeded the average speed of the slower train by 6 miles per hour. which of the following represents the speed of the faster train, in miles per hour? Correct Answer 44 Let the average speed of slower and faster trains be S and (S + 6) miles/hr respectively. Time taken = 10 am to 1:30 pm = 3.5 hr Distance travelled by slower train = 3.5S Distance travelled by faster train = 3.5(S + 6) Now,  3.5S + 3.5(S + 6) = 287 or, 3.5S + 3.5S + 21 = 287 or, 7S = 287 - 21 or, 7S = 266 or, S = 266/7 = 38 miles/hr So, speed of the faster train, S + 6 = 38 + 6 =  44 miles/hr

Explanation:

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older . If the ages of these two are excluded, the average , the average age of the remaining players is one year less than the average age of the whole team. what is the average age of the whole team? Correct Answer 23 years Let the average age of the whole team by x years 11x - ( 26 + 29) = 9 ( x - 1) 2x = 46 x = 23

Explanation:

The electric company charges Tk. 0.30 per kilowatt-hour (KWH). Rahim used 2800 KWH in April, 3200 KWH in May, and 3600 in June. What was his average cost of electricity for the 3 months? Correct Answer Tk. 72 Total Electricity cost for the three months= 2800*0.30+3200*0.30+3600*0.30=2880tkAverage cost of electricity for the three months=2880/3=960tkso the answer is none of these from the options

Explanation:

A worker is paid d Dollar an hour for the first 8 hours. Four every hour after the first 8 hours, she is paid c dollars an hour. If she works 12 hours in one day, what is the average hourly wage for that day? Correct Answer 8d+4c first 8 hours, the worker gets = 8d dollarsremaining(12-8) or 4 hours, the worker gets = 4cTotal earning wage of the worker = 8d+4cnow, average hourly wage = (8d+4c)/12

Explanation:

Find the average of all whole number between 1 and 100 that end in 3. Correct Answer 44 The numbers are 3, 13, 23.33.......93 So difference between each number is same. This series in AP. The avarage formula for AP is (first + last term)/2 Therefore the answer is (3 + 93)/2 = 48.

Explanation:

a, b, c, d, e, f are five consecutive odd numbers, their average is- Correct Answer 5(a+4) Hints: পাঁচটি consequtive odd নাম্বার এর প্রথমটি a হলে বাকিগুলা a + 2, a + 4, a + 6, a + 8, এদের যোগফল = a + 2 + a + 4 + a + 6 + a + 8 = 5(a + 4) average = {5(a + 4)/5 = a + 4

Explanation:

The average daily income of Mr. A and Mr. B is Tk. 350, of Mr. B and Mr. C is Tk. 365, and of Mr. A and Mr. C is Tk. 340. What is the weekly income of Mr. A if he works 5 days in a week? Correct Answer Tk. 1,625 Mr. A + Mr. B = 350*2 = 700 tkMr. B + Mr. C = 365*2 = 730 tkMr. A + Mr. C = 340*2 = 680 tk 2(Mr. A + Mr. B+ Mr. C) = 2110 tk (After Summation)Mr. A + Mr. B+ Mr. C = 1055  Now,  daily income of Mr. A = 325 tk,    Mr. B = 375 tk,    Mr. C = 355 tk Weekly income of A (5 days for 1 week) = 325*5                                                                          = 1625 tk (Ans)

Explanation:

In a cricket championship tournament, Team Dhaka has won 30 games out of 50 played. It has 45 more games to play. In order. In order to maintain an average of 80% victory rate, team Dhaka has to win how many games? Correct Answer 24 Hints: Total games = 50 + 45 = 95 80% of 95 = 80/100× 95 = 76 Therefore they need more win = 76 - 30 = 46 games

Explanation:

The average wage of a worker during a fortnihgt comprising 15 consecutive working days was Taka 90 per day. During the first 7 days, his average wage was Taka 87 per day and the average wage during the last 7 days was Taka 92 per day. What was his wage on the 8th day ? Correct Answer 97 15 দিনের কাজের মোট বেতন ( 15 × 90) = 1350 টাকা ১ম 7 দিন ও শেষ 7 দিনের কাজের মোট বেতন ( 7 × 87 + 7 × 92) = 609 + 644 = 1253 টাকা। অষ্টম দিনের কাজের বেতন ( 1350 - 1253) টাকা = 97 টাকা

Explanation:

A car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on the highway. According to these rates, which of the following is closest to the number of miles per gallon that the car averages when it is driven 10 miles in the city and then 50 miles on the highway? Correct Answer 36 গাড়িটি সিটিতে 25 মাইল যায় 1 ঘন্টায় ∴ ,, ,, 10 ,, ,, 1025 = 25 ঘন্টায় গাড়িটি highway - তে 40 মাইল যায় 1 ঘন্টায় ∴ ,, ,, 50 ,, ,, 5040 = 54 ঘন্টায় ∴ গাড়িটি 25 + 54 বা 3320 ঘন্টায় যায় (10 + 50) বা 60 মাইল ∴ ,, 1 ,, ,, ,, 60×2033 ,, = 36.36 ≈ 36

Explanation:

The average of 6 numbers is 8.5, when one number is discarded the average of the remaining numbers becomes 7.2 . What is the discarded number ? Correct Answer 7.8 6 টি নাম্বার এর সমষ্টি ( 6×8.5) = 51 5 টি নাম্বার এর সমষ্টি ( 5 ×7.2) = 36  ( - ) বিয়োগ করে, = 15   Discarded সংখ্যাটি = 15

Explanation:

A store has five shelves and average weekly sale is Tk. 30000. Shelf 1 accounted for 1/4 of the store's average weekly sales and shelves 2 and 3 each accounted for 2/3 as much as shelf 1. The shelf 4 alone accounted for as much as shelf 1, then which of the following could have been the average weekly sales of shelf 5 for the store? Correct Answer Tk. 500 Shelves 2 and 3 each accounted for 14×23 = 16 of the stores average wekly sales. ∴ 1,2,3,4 সেলফের মোট বিক্রয় = 14 + 16 + 16 + 14 = 3 + 2 + 2 + 312 = 1012 মোট বিক্রয়ের 56 অংশ Weekly sales of shelf 5 = 1 - 56 = 16 অংশ মোট বিক্রয়ের 16 অংশ = 30,000×16 = 5,000 Taka.