1.

The mean of 15 observations is 8. If the mean of the first eight observations is 7 and that of the last eight observations is 10, then find the value of the 8th observation.

Answer»

The mean of 15 observations is 8. If the mean of the first eight observations is 7 and that of the last eight observations is 10, then find the value of the 8th observation.




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