JEE MAIN - Mathematics (2021 - 27th August Morning Shift - No. 17)
Let n be an odd natural number such that the variance of 1, 2, 3, 4, ......, n is 14. Then n is equal to _____________.
Answer
13
Explanation
$${{{n^2} - 1} \over {12}} = 14 \Rightarrow n = 13$$
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