JEE MAIN - Mathematics Hindi (2016 - 9th April Morning Slot - No. 9)

$$\sum\limits_{r = 1}^{15} {{r^2}\left( {{{{}^{15}{\mathrm{C}_r}} \over {{}^{15}{\mathrm{C}_{r - 1}}}}} \right)} $$ का मान है :

$$560$$

$$680$$