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: