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Question

A bag contains 9 red and 6 blue balls. Find the probability that a ball drawn from a bag at random is (i) Red ball (ii) blue ball

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Solution

Number of red balls = 9Number of blue balls = 6Total number of balls = 9+6 = 15Total number of possible outcomes = 15a.Number of red balls = 9Number of favourable outcomes = 9Pa red ball = Number of favourable outcomesTotal number of possible outcomes = 915 = 35b.Number of blue balls = 6Number of favourable outcomes = 6Pa blue ball = Number of favourable outcomesTotal number of possible outcomes = 615 = 25

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