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If .^(n)P(r) = 720 . " If " .^(n)C(r) ...

If ` .^(n)P_(r) = 720 . " If " .^(n)C_(r) = 120 " find " n , r`

A

2

B

4

C

3

D

5

Text Solution

Verified by Experts

The correct Answer is:
C
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