Question

a bag contains 15 balls of which some are white and others are red if the probability of drawing a red ball is twice that of White ball find the number of white ball in the bag

Answer 1

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Answer 2

Answer:

Number of red balls = 5

And number of white balls = 10

Step-by-step explanation:

Total number of balls in the bag = 15

Let number of red balls in the bag = x

So, number of white balls in the bag = 2x

So, Probability of drawing a red ball = x/15

⇒ Probability of drawing a white ball = 2x/15

Since, The sum of probabilities is 1

⇒ x/15 + 2x/15 = 1

⇒ 3x/15 = 1

⇒ 3x = 15

⇒ x = 5

Number of red balls = 5

And number of white balls = 10