Question

A bag contains 6 red balls and some blue balls. If
The probability of drawing
ball is twice that of
a red ball
find the number of ball in the bag.
a blue​

Answer 1

let the no of blue ball=x

total no of ball=6+x

A T Q

x/6+x = 2*6/6+x

x=12

no of blue ball=x=12

total no of ball=6+x=6+12=18