Discussion of Question with ID = 035 under Averages

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Question

What is the increase in the average of 16 numbers if the number 2 is replaced by 34?

A

2.

B

3.

C

1.

D

4.

Soln.
Ans: a

If a number r is replaced by a number R, the increase/decrease of average is determined according to the formula $(R - r)/n$. So in our case we have R = 34, r = 2, n = 16. So increase = $(34 - 2)/16$ = 2.


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