The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students 10 years and that of the other 9 students is 16 years. The age of the 15th student is ________

A. 11 years

B. 14 years

c. 15 years

D. 15 2/7 years

A pupil’s marks were wrongly entered as 83 instead of 63, Due to the average marks for increased b half. The number of pupils in the class is ____________?

A. 20

B. 10

C. 40

D. 73

The mean of 50 observations was 36. It was found later that an observation 48 was wrong the corrected new mean is

A. 35.2

B. 36.1

C. 36.5

D. 39.1

If the arithmetic mean of seventy-five numbers is calculated, it is 35. If each number is in then mean of new number is _________

A. 70

B. 30

C. 40

D. 90

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate 40 overs to reach the target of 282 runs?

A. 6.25

B. 6.5

C. 6.75

D. 7

The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg find the average weights of all the boys in the class.

A. 47.55 kg

B. 48 kg

C. 55 kg

D. 49.25 kg

The average weight of A, B and C 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg. Then the weight of B is

A. 17 kg

B. 20 kg

C. 26 kg

D. 31 kg

Complete the series 2, 4, 7, 11, 16….

A. 11

B. 20

C. 25

D. 22

Complete the series 5, 14, 27, 44, 65——

A. 109

B. 88

C. 90

D. 180

Complete the series 1, 4, 10, 22, 46——

A. 68

B. 48

C. 12

D. 94