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The probability that a student is not a ...

The probability that a student is not a swimmer is `1/5` . Then the probability that out of five students, four are swimmers is (A) `^5C_4""(4/5)^4""1/5` (B) `(4/5)^4""1/5` (C) `^5C_1 1/5(4/5)^4` (D) None of these

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