Mathematics · 2023
JEE Main · 31 January 2023, Shift 1 · Q89
If the variance of the frequency distribution is 3, then α is equal to ____.
If the variance of the frequency distribution
is $\displaystyle 3$ , then $\displaystyle \alpha$ is equal to $\displaystyle \_\_\_\_$.
| $\displaystyle x_i$ | $\displaystyle 2$ | $\displaystyle 3$ | $\displaystyle 4$ | $\displaystyle 5$ | $\displaystyle 6$ | $\displaystyle 7$ | $\displaystyle 8$ |
| Frequency $\displaystyle f_i$ | $\displaystyle 3$ | $\displaystyle 6$ | $\displaystyle 16$ | $\displaystyle \alpha$ | $\displaystyle 9$ | $\displaystyle 5$ | $\displaystyle 6$ |
Official answer
From NTA’s final answer key for this paper.
5
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JEE Main 2023 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.