MCQ
यदि ${ }^{15} \mathrm{C}_{3 r}={ }^{15} \mathrm{C}_{r+3}$, तो $r$ बराबर है :
  • A
    5
  • B
    4
  • 3
  • D
    2

Answer

Correct option: C.
3
(C) 3

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