If 15 C 3 r -15 C r -3- then the value of r isA- 3B- 4C- 5D- 8

The correct option is A 3 ^15C_3r = ^15C_r+3⇒^15C_15 3r = ^15C_r+3 ⇒ 15 3r = r+3 ⇒ r =3 ...

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Summation by Sigma Method

If 15 C 3 r =...

Question

If $^{15} C_{3 r}$ = $^{15} C_{r + 3}$ , then the value of r is

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^{15} C_{3 r} =^{15} C_{r + 3}

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^{15} C_{3 r} =^{15} C_{r + 3}

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