यदि ${S_n} = \sum\limits_{r = 0}^n {\frac{1}{{^n{C_r}}}} $ और ${t_n} = \sum\limits_{r = 0}^n {\frac{r}{{^n{C_r}}}} $ है,तो $\frac{{{t_n}}}{{{S_n}}}$ का मान क्या होगा?

  • A
    $\frac{{2n - 1}}{2}$
  • B
    $\frac{1}{2}n - 1$
  • C
    $n - 1$
  • D
    $\frac{1}{2}n$

Explore More

Similar Questions

$\frac{1}{1!(n - 1)!} + \frac{1}{3!(n - 3)!} + \frac{1}{5!(n - 5)!} + \dots = $

मान लीजिए $(1+x)^{10} = \sum_{r=0}^{10} c_{r} x^{r}$ और $(1+x)^{7} = \sum_{r=0}^{7} d_{r} x^{r}$ है। यदि $P = \sum_{r=0}^{5} c_{2r}$ और $Q = \sum_{r=0}^{3} d_{2r+1}$ है, तो $\frac{P}{Q}$ का मान ज्ञात कीजिए:

यदि $\sum_{k=1}^{10} k^{2} \binom{10}{k}^{2} = 22000 L$ है,तो $L$ का मान $.....$ है।

यदि $(1+x-2x^2)^6 = 1+a_1x+a_2x^2+\ldots+a_{12}x^{12}$ है, तो $a_2+a_4+a_6+\ldots+a_{12}$ का मान ज्ञात कीजिए।

$\frac{^{100}C_{50}}{51} + \frac{^{100}C_{51}}{52} + \dots + \frac{^{100}C_{100}}{101}$ का मान ज्ञात कीजिए:

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo