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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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MODERN PUBLICATION-PROBABILITY-EXERCISE
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  10. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  11. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  12. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  13. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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