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Mathematics · 2020
JEE Main · 7 January 2020, Shift 1 · Q71
If the variance of the first n natural numbers is 10 and the variance of the first m even natural numbers is 16, then m + n is equal to \ \ \ \.
If the variance of the first n natural numbers is $\displaystyle 10$ and the variance of the first $\displaystyle m$ even natural numbers is $\displaystyle 16$, then $\displaystyle \mathrm{m}+\mathrm{n}$ is equal to \_\_\_\_.
Official answer
18
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.