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A bag contains 6 red balls and some blue balls. If the probability of drawing a blue ball from the bag is twice that of a red ball, find the number of
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A bag contains 6 red balls and some blue balls....
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Nov 17, 2021
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JackTerrance
A bag contains 6 red balls and some blue balls. If the probability of drawing a blue ball from the bag is twice that of a red ball, find the number of blue balls in the bag. Select the correct answer from above options
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Nov 17, 2021
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JackTerrance
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Let the number of blue balls in the beg be x. Then, total number of balls = (5+x). Given , P(a blue ball) `=3 xx ` P(a red ball) ` :. x/((5+x)) = 3 xx 5/((5+x)) rArr x = 15`. Hence, the number of blue balls in the bag is 15.
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