Question

The average of X, Y, Z is 24. Also, X:Y = 2:3 and X+Y = 60, then find the value of (X-Z)
A. 9
B. 10
C. 11
D. 12
E. None of these

Answer 1

X + Y + Z     = 24

     3

X + Y + Z = 72

X + Y = 60

Z = 72 - 60 = 12

X + Y = 72 - 12 = 60

X:Y = 2:3

X = 60 x 2/5 = 12 x 2 = 24    

X - Z = 24 - 12 = 12