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If two natural numbers r and s are drawn...

If two natural numbers r and s are drawn one at a time, without replacement from the set S={1,2,3,….n}, then find P`(rlep|slep)` where p`in`S.

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`because` Set S={1,2,3,…n}
`therefore P(rlep//slep)=(P(pcapS))/(P(S))`
`=(p-1)/nxxn/(n-1)=(p-1)/(n-1)`
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