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Find the number of selections of one or ...

Find the number of selections of one or more things from the group of p identical things of one type, q identical things of another type, r identical things of the third type and n different things.

A

`n.2^(n)`

B

`(n+2)^(2n-1)`

C

`n2^(n-1)`

D

None of these

Text Solution

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The correct Answer is:
b
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