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If ""^(12)P(r)=""^(11)P(6)+ 6(""^(11)P(5...

If `""^(12)P_(r)=""^(11)P_(6)``+` `6``(""^(11)P_(5))`, then `r` is equal to

A

7

B

5

C

6

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
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