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If nC12 = nC8, then n is equal to:

(a) 20

(b) 12

(c) 6

(d) 30

0 3 Views | Posted 3 months ago
Asked by Shiksha User

  • 1 Answer

  • P

    Answered by

    Payal Gupta | Contributor-Level 10

    3 months ago

    This is an Objective Type Questions as classified in NCERT Exemplar

    G i v e n     t h a t : C 1 2 n = C 8 n ⇒                                     C n − 1 2 n = C 8 n                       [ ? C r n = C n − r n ] ⇒                                     n − 1 2 = 8 ⇒                                                         n = 8 + 1 2 = 2 0 H e n c e ,     t h e     c o r r e c t     o p t i o n     i s     ( a ) .

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