Question

A bag contains 5 white balls and some blue balls. If probability of drawing a blue ball is double that of white ball, determine the number of blue balls in tha bag​

Answer 1

Answer:

no. of blue balls in the bag is 10

Step-by-step explanation:

Let number of blue balls in the bag =x

Total no of balls in bag =5+x [No. of redball =5]

Probability of drawing a blue ball = no. of blue ball / total no. of balls

P(B) = x/5+x

Probability of drawing a White ball = no. of white ball / total no. of balls

P(W)= 5/5+x

Given,

P(B) = 2P (R)

x/5+x = 2(5/5+x)

x=10

Hence, no. of blue balls in the bag =10.