Four persons independently solve a certain problem correctly with probabilities 1 2 , 3 4 , 1 4 , 1 8 . Then the probability that the problem is solved correctly by at least one of them is

JEE Advanced 2013 Mathematics question

Four persons independently solve a certain problem correctly with probabilities . Then the probability that the problem is solved correctly by at least one of them is

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

Answer: (A)

Solution

P(none solves) (independence). P(at least

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Question ID VK-026165