यदि $1^2 \cdot \binom{15}{1} + 2^2 \cdot \binom{15}{2} + 3^2 \cdot \binom{15}{3} + \ldots + 15^2 \cdot \binom{15}{15} = 2^m \cdot 3^n \cdot 5^k$,जहाँ $m, n, k \in N$,तो $m + n + k$ का मान है :-

  • A
    $19$
  • B
    $21$
  • C
    $18$
  • D
    $20$

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यदि $(1 + x)^n = C_0 + C_1x + C_2x^2 + .......... + C_nx^n$ है,तो $\frac{C_1}{C_0} + \frac{2C_2}{C_1} + \frac{3C_3}{C_2} + .... + \frac{nC_n}{C_{n - 1}} = $

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यदि $\sum\limits_{K = 1}^{12} {12K \cdot {^{12}C_K} \cdot {^{11}C_{K - 1}}} $ का मान $\frac{{12 \times 21 \times 19 \times 17 \times \dots \times 3}}{{11!}} \times {2^{12}} \times p$ के बराबर है,तो $p$ का मान ज्ञात कीजिए।

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