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A bag contains n coupons marked 1,2,3 ...

A bag contains n coupons marked 1,2,3 , …. , n .If two coupons are drawn , then the chance that the difference of the coupons exceeds m ( les than n - 1) is :

A

`((n-m)(n+m-1))/(n(n-1))`

B

`((n-m)(n-m-1))/(n(n-1))`

C

`((n+m)(n+m-1))/(n(n-1))`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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