10 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations. The mean of the combined set is

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Q 3042845733.     10 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations. The mean of the combined set is given by
A

`15`

B

`10`

C

`8.5`

D

`7.5`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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