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Find the sum sum(i=0)^r.^(n1)C(r-i) .^(n...

Find the sum `sum_(i=0)^r.^(n_1)C_(r-i) .^(n_2)C_i` .

A

`""^(n_(1)+n_(2))C_(r+1)`

B

`""^(n_(1)+n_(2))C_(r-1)`

C

`""^(n_(1)+n_(2))C_(r)`

D

`""^(n_(1)+n_(2)+1)C_(r)`

Text Solution

Verified by Experts

The correct Answer is:
C
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