JEE Advanced 2012 Mathematics question

Four fair dice , , and , each having six faces numbered 1, 2, 3, 4, 5 and 6, are rolled simultaneously. The probability that shows a number appearing on one of , and is

(A)Correct
(B)
(C)
(D)

Answer: (A)

Solution

Whatever number shows, the probability that none of , , shows it is . So the

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Question ID VK-026109