Could anyone please give me some example to understand this question?? I am confused..

Which of the following procedures is alwasys equivalent to adding 5 numbers and then deviding the sum by 5?

I. Multiplying the 5 numbers and then finding the 5th root of the product.

II. Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left.

III. Ordering the 5 numbers numerically and then selecting the middle number.


A) None
B) I only
C) II only
D) III only
E) I and III


The answer is C