Question

Three persons
i.e. ‘D’, ‘E’ and ‘F’, are given the same puzzle to solve. The probability that ‘D’, ‘E’ and ‘F’ will solve the puzzle is (5/8), (2/3) and (3/5), respectively. Find the probability that exactly one of them will not solve the puzzle.

A 73/120
B 53/120
C 59/120
D 61/120
E 13/24
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