# Question #8d811

##### 1 Answer

Jul 1, 2016

The right answer is (b)

#### Explanation:

Let the height of five men be

We know that

(1)

(2)

(3)

Our task is to determine

SOLUTION

From (1):

(4)

From (3):

(5)

Substitute (2) and (5) into (4) getting

from which follows

CHECK the average height of all five men: