50% of all the cars consisted of which colors of car?

From above given chart ,
selling of white colours' cars = 26%
selling of Golden colours' cars = 6%
selling of Blue colours' cars = 13%
selling of Black colours' cars = 5%
Since , 50% of all the cars consist of White, Golden, Blue and Black colours of cars .
Required answer = 26 + 6 + 13 + 5 = 50%