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Statistics question

2023 · 8 Apr · Shift 2 · Q27

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JEE Main
Mathematics
Statistics
2023 · 8 Apr · Shift 2 · Q27

Statistics question

2023 · 8 Apr · Shift 2 · Q27

JEE MainMathematicsStatisticsMCQ+4 / −1

Let the mean and variance of 12 observations be

\frac{9}{2}

and 4 respectively. Later on, it was observed that two observations were considered as 9 and 10 instead of 7 and 14 respectively. If the correct variance is

\frac{m}{n}

, where

\mathrm{m}

and

\mathrm{n}

are coprime, then

\mathrm{m}+\mathrm{n}

is equal to :

A
317
B
316
C
314
D
315

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