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A bag contains 5 red balls …

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A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bag is thrice that of red ball, find the no. Of blue balls in the bag

Posted by Rakhi Sharma 5 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Lucifer ? Morningstar? 5 years, 5 months ago

Let there be x blue balls in the bag. ∴ Total number of balls in the bag = 5 + x| | Now, Probability of drawning a blue ball = x/x+5 => Probability of drawing a red ball = 5/x+5 | | But it is given that = x/x+5=3{5/x+5} ⇒ = 15

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CBSE > Class 10 > Mathematics