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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)^41/5` (B) `(4/5)^41/5`(C) `^5C_1 1/5(4/5)^4` (D) None of these

A

`""^5C_(1)(4/5)^4(1/5)`

B

`""^5C_(1)(4/5)(1/5)^4`

C

`(4)/(5)(1/5)^4`

D

`5(4/5)^5(1/5)`

Text Solution

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The correct Answer is:
B
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