Question

If the mean of x and y is 32 and the mean of y and z is 50, then what is the value of x - z?

Answer 1

x - z = -36

Explanation:

Given:

x + y y + z

---------- = 32 and ---------- = 50

2 2

These lead to x + y = 64 and y + z = 100

Subtracting the second equation from the first yields:

x + y = 64

-( y + z = 100)

------------------------

x - z = -36