Question

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

Answer 1

Answer:

The no. of blue balls in the bag is 15.

Step-by-step explanation:

let number of blue balls = n

∴ total balls = (n+5)

P(blue ball) = n

n+5

P(red ball) = 5

n+5

as per question,

P(blue ball) = 3 × P(red ball)

n = 3× 5

n+5 n+5

∴n=15

total number of blue balls is 15