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IF ""^(15)C(r+3)=""^(15)C(2r-3), then r...

IF `""^(15)C_(r+3)=""^(15)C_(2r-3)`, then r=

A

4 or 7

B

5 or 6

C

7 or 9

D

9 or 10

Text Solution

Verified by Experts

The correct Answer is:
C
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