Mathematics · 2022
JEE Main · 27 July 2022, Shift 1 · Q6
Suppose a_1, a_2, …, a_n, … be an arithmetic progression of natural numbers. If the ratio of the sum of first five terms to the sum of first nine…
Suppose $\displaystyle a_1, a_2, \ldots, a_{\mathrm{n}}, \ldots$ be an arithmetic progression of natural numbers. If the ratio of the sum of first five terms to the sum of first nine terms of the progression is $\displaystyle 5$ : $\displaystyle 17$ and $\displaystyle 110<a_{15}<120$, then the sum of the first ten terms of the progression is equal to
Official answer
(2)
$\displaystyle 380$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.