Value of r for which \[^{15}{{C}_{r+3}}={{\,}^{15}}{{C}_{2r-6}}\] is [Pb. CET 1999]

Value of r for which \[^{15}{{C}_{r+3}}={{\,}^{15}}{{C}_{2r-6}}\] is [

1.	Value of r for which \[^{15}{{C}_{r+3}}={{\,}^{15}}{{C}_{2r-6}}\] is [Pb. CET 1999]
A.	2
B.	4
C.	6
D.	-9
Answer» D. -9

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Value of r for which \[^{15}{{C}_{r+3}}={{\,}^{15}}{{C}_{2r-6}}\] is [Pb. CET 1999]

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