Variance of $^{10}C_0$ , $^{10}C_1$ , $^{10}C_2$ ,.... $^{10}C_{10}$ is 

  • A

    $\frac{{10.\,{}^{20}{C_{_{10}}} - {2^{10}}}}{{100}}$

  • B

    $\frac{{11\,{}^{20}{C_{_{10}}} - {2^{10}}}}{{11}}$

  • C

    $\frac{{10.\,{}^{20}{C_{_{10}}} - {2^{20}}}}{{100}}$

  • D

    $\frac{{11.\,{}^{20}{C_{_{10}}} - {2^{20}}}}{{121}}$

Similar Questions

The following values are calculated in respect of heights and weights of the students of a section of Class $\mathrm{XI}:$

  Height Weight
Mean $162.6\,cm$ $52.36\,kg$
Variance $127.69\,c{m^2}$ $23.1361\,k{g^2}$

Can we say that the weights show greater variation than the heights?

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If wrong item is omitted.

The mean and standard deviation of $20$ observations were calculated as $10$ and $2.5$ respectively. It was found that by mistake one data value was taken as $25$ instead of $35 .$ If $\alpha$ and $\sqrt{\beta}$ are the mean and standard deviation respectively for correct data, then $(\alpha, \beta)$ is :

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