Let a₁, a₂, …, a₁₀ be 10 observations with Σ a_k = 50 and Σ (a_k… | JEE Main 2024 Mathematics PYQ | Jeeify

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MCQMediumJEE Main 2024 · 27 January, Shift 1Measures of Dispersion

Let $a_1, a_2, \ldots, a_{10}$ be $10$ observations with $\sum a_k = 50$ and $\sum (a_k \cdot a_j) = 1100$ . Find the standard deviation.

A
$5$
B
$\sqrt{5}$
C
$10$
D
$\sqrt{115}$

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