The mean of 5 observations is 4 4 and variance is 8 24. If three of the five observations are 1, 2 and 6, then what are the other two observations?

NDA 2019 Mathematics question

The mean of 5 observations is and variance is . If three of the five observations are 1, 2 and 6, then what are the other two observations?

Answer: (B)

Let the others be . Sum: . Sum of squares: $ = 5(8·24+4·

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Question ID VK-029159