The value of … is equal to :

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Permutations and Combinations

JEE Main 2016 · 9 Apr, Morning shift · Q4820

MathematicsMedium98×since 2002Q4820

The value of

\sum\limits_{r = 1}^{15} {{r^2}} \left( {{{{}^{15}{C_r}} \over {{}^{15}{C_{r - 1}}}}} \right)

is equal to :

JEE Main 2016 · 9 Apr, Morning shift · Q4820

MathematicsMedium98×since 2002Q4820

The value of

\sum\limits_{r = 1}^{15} {{r^2}} \left( {{{{}^{15}{C_r}} \over {{}^{15}{C_{r - 1}}}}} \right)

is equal to :