(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I realise this is probably an obvious question, but if there are two groups, say group A and group B, where group A was full of old people, and group B full of children.

The mean age was 67 for group A

and the mean age was 5 for group B.

If these two groups joined together to make one big group, what is the new mean?

3. The attempt at a solution

is it just ( 67 + 5 ) / 2

so it would be 36?

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# Homework Help: Calulating the Mean

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