Question

a bag contains 15 balls of which some are white and others are red if the probability of drawing a red ball is twice that of White ball find the number of white ball in the bag

Answer 1

I guess seven is the answer

Answer 2

the number of balls in a bag =15
Let the number of white balls = x
=>the number of red balls = 2x
Therefore, x +2x = 15
or 3x = 15
or x = 15/3
or x = 5
Number of white balls = x =1 × 5 = 5
number of red balls = 2x = 2 × 5 = 10