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Statistics question

2023 · 15 Apr · Shift 1 · Q30

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JEE Main
Mathematics
Statistics
2023 · 15 Apr · Shift 1 · Q30

Statistics question

2023 · 15 Apr · Shift 1 · Q30

JEE MainMathematicsStatisticsMCQ+4 / −1

The mean and standard deviation of 10 observations are 20 and 8 respectively. Later on, it was observed that one observation was recorded as 50 instead of 40. Then the correct variance is :

A
11
B
12
C
13
D
14

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