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MHT CET 2022 Mathematics question

MathematicsStatisticsMHT CET 2022

The variance and mean of 15 observations are respectively 6 and 10. If each observation is increased by 8 then the new variance and new mean of resulting observations are respectively

Answer: (C)

Solution

Adding a constant to every observation shifts the mean by () but does not change the deviations , so the variance stays . Hence

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Question ID VK-097019