Question
12 Marbles and 12 balls are kept in a box. If 4 items
are chosen at random, Find the probability that 2 is a marble and another 2 is ballSolution
Total probability = 12C4 = 495 Probability that 2 is marble and another 2 is ball = 12C2 × 12C2 = 4356 probability = 495/4356 = 55/484
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