Mathematics · 2021
JEE Main · 17 March 2021, Shift 2 · Q76
The value of Σ_r =0^6(^6 C_r ·^6 C_6- r ) is equal to:
The value of $\displaystyle \sum_{\mathrm{r}=0}^6\left({ }^6 \mathrm{C}_{\mathrm{r}} \cdot{ }^6 \mathrm{C}_{6-\mathrm{r}}\right)$ is equal to :
Official answer
(1)
$\displaystyle 924$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.