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If the mean of 5 numbers is 10 and the mean of other 15 numbers is 20 , what is the combined mean of both 20 numbers​

User Halflings
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1 Answer

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Answer:

17.5

Explanation:

The sum of the 5 numbers is 5·10 = 50.

The sum of the 15 numbers is 15·20 = 300.

The sum of all 20 numbers is then 50+300 = 350, so their mean is ...

mean = sum/number = 350/20 = 17.5

The combined mean of the 20 numbers is 17.5.

User Farhad Sarvari
by
6.3k points
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