# Mean

## Trending Questions

**Q.**

The average weight of 45 students in a class was calculated as 36 kg. It was later found that the weight of two students in the class was wrongly calculated. The actual weight of one of the boys in the class was 32 kg but it was calculated as 34 kg and the weight of another boy in the class was 45 kg, whereas it was calculated as 40 kg. What is the actual average weight of the 45 students in the class? (Rounded off to two digits after decimal)

- 36.16 kg
- Cannot be determined
- 36.07 kg
- None of these
- 35.84 kg

**Q.**The average weight of 5 persons, sifting in a boat, is 38 Kg. If the average weight of the boat and the persons sitting in the boat is 52 Kg, what is the weight of the boat?

- None of these
- 228 Kg
- 242 Kg
- 122 Kg
- 232 Kg

**Q.**Kamlesh bought 65 books for Rs 1050 from one shop and 50 books for Rs 1020 from another. What is the average price he paid per book?

- Rs 36.40
- Rs 24
- Rs 18
- Rs 18.20
- None of these

**Q.**

What are the fourth roots of $16$?

**Q.**The H.C.F. of two numbers is 16 and their L.C.M. is 160. If one of the numbers is 32, then which of the following is the other number?

- 12
- 80
- 48
- 112
- 96

**Q.**

The average monthly income of A and B is Rs. 5000. The average monthly income of B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5250. What is the monthly income of A?

5250

4250

4500

4000

5000

**Q.**If the ratio of harmonic mean of two numbers to their geometric mean is 12 : 13, find the ratio of the numbers.

- None of these
- 49 or 94
- 25 or 52
- 23 or 32

**Q.**Four geometric means are inserted between 18 and 128. Find the third geometric mean?

- 4
- 8
- 16
- 32

**Q.**A man spends on an average Rs. 269.47 for the first 7 months and Rs. 281.05 for the next 5 months. Find out his monthly salary if he saved Rs. 308.46 during the year.

- Rs. 400
- Rs. 500
- Rs. 600
- Rs. 300
- None of these

**Q.**The average height of 16 students is 142 cm. If the height of the teacher is included, the average height increases by 1 cm. The height of the teacher is

- 156 cm
- 157 cm
- 159.5 cm
- 159 cm
- 158 cm

**Q.**The average earnings of a mechanic for the first four days of a week is Rs. 18 and for the last four days is Rs. 22. If he earns Rs. 20 on the fourth day, his average earnings for the whole week is:

- Rs. 18.95
- Rs. 16
- Rs. 20
- Rs. 25.71
- None of these

**Q.**X and Y are two numbers whose A.M. is 41 and G.M. is 9. Which of the following may be a value of X?

- 49
- 81
- 25
- 125

**Q.**

Joseph bought two varieties of rice, costing 5 cents per ounce and 6 cents per ounce each, and mixed them in some ratio. Then he sold the mixture at 7 cents per ounce, making a profit of 20 percent. What was the ratio of the mixture?

2:5

1:5

4:5

none

**Q.**What is the average marks scored by the students in Sociology?

- 102.2
- 99.5
- 98.5
- 100.5
- None of these

**Q.**

The average of seven numbers is 28. If one number is excluded, the average becomes 26. What is the excluded number?

38

40

42

41

36

**Q.**Two numbers A and B are such that A > B and their G.M. is 40% lower than their A.M. Find the ratio between the numbers.

- 3 : 1
- 9 : 1
- 2 : 1
- 4 : 3

**Q.**

How do you find the geometric mean and harmonic mean** **$?$

**Q.**The average of 12 numbers is 18. Find the new average when

A. The average of first 10 numbers is 20

B. Each number is multiplied by 6.

- The data in both statements A and B together are necessary to answer the question.
- The data in statement A alone is sufficient to answer the question.
- The data in statement B alone is sufficient to answer the question
- The data either in statement A alone or in statement B alone is sufficient to answer the question
- The data given in both statements A and B together are not sufficient to answer the question.

**Q.**

The average of five numbers is 28. If one number is excluded, the average becomes 26. The excluded number is

30

40

25

35

36

**Q.**What are the average marks obtained by all students together in Physics?

- 12313

- 11712

- 12312

- 11713
- None of these

**Q.**

If $l,m,n$ are in arithmetic progression, then the straight line $lx+my+n=0$ will pass through the point:

$\left(-1,2\right)$

$\left(1,-2\right)$

$\left(1,2\right)$

$\left(2,1\right)$

**Q.**

If the geometric mean and arithmetic mean of two numbers is 2 and 4 respectively. Then the harmonic mean of the two numbers is

1

8

16

2

**Q.**

A bag contains 50 P, 25 P and 10 P coins in the ratio 5: 9: 4, amounting to Rs. 206. Find the number of coins of each type respectively.

160, 200, 360

data insufficient

200, 360, 160

200, 160, 360

none

**Q.**What is the total number of students studying Arts in institutes A and G together?

- 1026
- 1126
- 1226
- 1206
- 1306

**Q.**What is the arithmetic mean of first 20 terms of an AP whose first term is 5 and 4th term is 20?

- 57.5
- 50
- 52.5
- 55

**Q.**

The sum obtained when two positive integers are multiplied by the bigger number is 204, and their difference when multiplied by the smaller number is 35. What are the two numbers?

12, 5

13, 4

14, 3

24, 7

- Cannot be ascertained

**Q.**If log (5ca), log(3b5c) and log(a3b) are in an AP (where a, b, and c are in a GP), then a, b, and c, are the lengths of sides of

- None of these
- An isosceles traingle
- An equilateral triangle
- A scalene triangle

**Q.**

Find the 8th term of the G.P. if the first term and common ratio are 4 and 6 respectively.

1119746

1119748

1119744

1119742

**Q.**If a be the arithmetic mean and b, c be the two geometric means between any two positive numbers, then (b3+c3)abc equals

- None of these
- (ab)12c
- 1
- a2cb

**Q.**The A.M. of two positive numbers is 15 and their GM is 12. What is the bigger number?

- 22
- 24
- 18
- 12
- 16