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JEE Main 2022 Mathematics question

MathematicsStatisticsJEE Main 2022

The mean of the numbers a, b, 8, 5, 10 is 6 and their variance is 6.8. If M is the mean deviation of the numbers about the mean, then 25M is equal to :

Answer: (1)

Solution

The mean gives a + b + 23 = 30, so a + b = 7. The variance gives ( + 100)/5 − 36 = 6.8, so $ +

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Question ID VK-025361