Question

The average of 20 numbers is 12 the average of first 12 numbers is 11 and that of the next 7 numbers is

Answer 1

Hello,

The average of 20 numbers is 12
So ,
The sum of 20 number is
$12 \times 20 = 240$
Now,
Average of first 12 numbers is 11
So ,
Sum of first 12 numbers is
$12 \times 11 = 132$
Now

Sum of last eight numbers is equal to
$240 - 132 = 108$
Now,

The average of last 8 numbers is
$\frac{108}{8} = 13.5$

Hope this will be helping you ✌️

I think the question is incomplete or something like that....

#be brainly