${ }^{34}C_{10} + 3 \cdot { }^{34}C_{9} + 3 \cdot { }^{34}C_{8} + { }^{34}C_{7} = $

  • A
    ${ }^{39}C_{10}$
  • B
    ${ }^{36}C_{10}$
  • C
    ${ }^{37}C_{10}$
  • D
    ${ }^{35}C_{10}$

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यदि $n$,$1$ से बड़ा एक पूर्णांक है,तो $a - ^nC_1(a - 1) + ^nC_2(a - 2) + \dots + (-1)^n(a - n) = $

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