Every white car at the event was a limosine Half of the blac

Every white car at the event was a limosine. Half of the black cars were limosines. Half of the limosines were white. There were 40 black cars and 50 white cars. How many were neither white or black

Solution

Suppose there are x cars

The number of white cars which limosine = 50

The number of black cars which limosine = 40/2 = 20

Half of the limosines are white, x/2=50 or x = 100

The number of cars neither white or black = 100 -50-40 = 10