MCQ
$\sum_{\mathrm{k}=0}^{20}\left({ }^{20} \mathrm{C}_{\mathrm{k}}\right)^{2}$ ની કિમંત મેળવો.
- A${ }^{40} \mathrm{C}_{21}$
- B${ }^{40} \mathrm{C}_{19}$
- C${ }^{40} \mathrm{C}_{20}$
- D${ }^{41} \mathrm{C}_{20}$
sum of suffix is const. so summation will be ${ }^{40} \mathrm{C}_{20}$
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વર્ગ |
$0 - 20$ |
$20 - 40$ |
$40 - 60$ |
$60 - 80$ |
$80 - 100$ |
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$f$ |
$17$ |
$f_1$ |
$32$ |
$f_2$ |
$19$ |