A box consists of white,yellow,green and black balls, in the ratio 2,3,1,6.Total number of balls are 432.How many yellow balls in the box

let the number of white, yellow, green and black balls be

2x , 3x , x , and 6x respectively

then solve
2x + 3x + x + 6x = 432
and sub the value of x into my definitions.

let me know what you got.