Respuesta :

irspow
If seven of the ten average 8 paintings they produce a total of 7*8=56 paintings

If three of the ten average 12 paintings they produce a total of 3*12=36 paintings.

So there are a total of 10 children and 56+36=92 paintings.

So the average of painting per students is:

92/10=9.2 paintings per child.