Question
A basket contains 9 orange, 6 purple and 12 silver
balls. Two balls are randomly picked from the basket, what is the probability that an orange and a purple ball are drawn?Solution
The probability that an orange and a purple ball are drawn = (9C1 Ă— 6C1)/27C2
= (9 Ă— 6)/351 = 54/351 = 2/13
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