A student was asked to find the arithmetic mean of the following 12 numbers: 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the arithmetic mean to be 12. The value of x is

Question

PYQPulse · Accepted Answer

7

PYQPulse · Answer

Explanation: Total must be 144; the 11 known numbers sum to 137, so x = 7.

A student was asked to find the arithmetic mean of the following 12 numbers: 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the arithmetic mean to be 12. The value of x is

Answer: B. 7

Explanation

A student was asked to find the arithmetic mean of the following 12 numbers: 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the arithmetic mean to be 12. The value of x is

Answer: B. 7

Explanation