Question

a bag contains 5 red balls and some Blue Balls if the probability of drawing a blue ball from the bag is 4 times that of red ball find the number of blue balls in the bag

Answer 1

Step-by-step explanation:

No. of red balls=5

Let no. of blue balls be = y

Total balls  =5+y

by data,

y/5+y = 3 X 5/y+5

y=15

no. of blue balls=15

P (of blue ball) =15/20=3/4