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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 of a red ball,

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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 of a red ball, find the number of blue balls in the bag. Select the correct answer from above options

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Let the number of blue balls be x. So, total number of balls in the bag = (x + 5) According to the question, Number of blue balls = 15

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