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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.