The mean of 15 observations is 14. If the mean of first 7 observations is 12 and that of last 7 observations is 16, find the middle term.

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Solution

The correct option is B
14

Middle term = Sum of 15 observations – (Sum of first 7 observations + Sum of last 7 observations)

= 15x14 – (7x12+ 7x16) =14

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The mean of 15 observations is 14. If the mean of first 7 observations is 12 and that of last 7 observations is 16, find the middle term.

The correct option is B 14Middle term = Sum of 15 observations – (Sum of first 7 observations + Sum of last 7 observations) = 15x14 – (7x12+ 7x16) =14

The correct option is B
14

Middle term = Sum of 15 observations – (Sum of first 7 observations + Sum of last 7 observations)

= 15x14 – (7x12+ 7x16) =14