3 years ago

The mean of eight numbers is 83. the mean of another four numbers is 14. find the mean of the combined set of numbers.

1 answer:

8 0

Total numbers =8+4=12
$mean= \frac{83*8+14*4}{8+4}$ $mean= \frac{664+56}{12} 
= \frac{720}{12} 
=60$

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