Question

A bag contains 5 red balls and some blue
balls. If the probability of drawing blue ball from
the bag is 4 times that of red ball find the no. of blue balls in the bag... It's urgent.. Plssss​

Answer 1

Answer: 20

Step-by-step explanation: 5 red balls and 4times the prbability of drawing a blue ball 5x4=20

Answer 2

Answer:

The number of blue balls = 20

Step-by-step explanation:

Let the number of blue balls be x

∴ The total number of balls in the bag = 5 + x

P(Blue) = x / (5 + x) = 4 P(Red)

∴ x / (5 + x) = 4 × [5 / (5 + x)]

∴ x / (5 + x) = 20 / (5 + x)

∴ x = 20

∴ The number of blue balls in the bag is 20.

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