Question

A bag contains 12 white balls and some black balls. If the probability of drawing a white ball is 3 times of a black balls , determine the number of black balls in the bag

Answer 1

Answer:

....

Step-by-step explanation:

no. of white balls = 3 times of black balls.......

so if white balls =12

then,

no. of black balls =12÷3

..................................= 4