Mathematics · 2019
JEE Main · 9 April 2019, Shift 2 · Q67
If some three consecutive coefficients in the binomial expansion of (x+1)^n in powers of x are in the ratio 2: 15: 70, then the average of these…
If some three consecutive coefficients in the binomial expansion of $\displaystyle (x+1)^{\mathrm{n}}$ in powers of $\displaystyle x$ are in the ratio $\displaystyle 2$ : $\displaystyle 15$ : $\displaystyle 70$, then the average of these three coefficients is :
Official answer
(2)
$\displaystyle 232$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.