The average of X and Y is 40, and the average of Y and Z is What is the value of(X-Z)?
সমাধান
সঠিক উত্তর: Option B
(X + Y) / 2 = 40
or, (X + Y) = 80
Again,
(Y + Z) / 2 = 35
or, (Y + Z) = 70
Now,
(X + Y) - (Y + Z) = 80 - 70
or, X - Z = 10
