JEE Main 2012 Mathematics question

If the mean of 4, 7, 2, 8, 6 and a is 7 , then the mean deviation from the median of these observations is

Answer: (4)

Solution

Sum = 42, so a = 15. Ordered: 2, 4, 6, 7, 8, 15; median 6.5. Mean deviation

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Question ID VK-103515