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 a red ball find the number of blue balls in the bag​

Answer 1

Answer:

number of blue balls in the bag = 10

Explanation:

you can look the picture for explanation

I hope you got it!!!

Answer 2

Answer:

Number of blue balls in the bag = 15

Explanation:

Let the no. of blue balls be x

Therefore, total no. of balls in the bag = x + 5

P(getting a blue ball) = 3P(getting a red ball)

x/x+5 = 3 (5/x+5)

x/x+5. = 15/x+5

x = 15

Thus, the no. of blue balls in the bag is 15