Question 821321
The class average is :
( total of the scores ) / ( total number in the class )
{{{ ( 85*10 + 95*20 ) / ( 10 + 20 ) }}}
{{{ ( 850 + 1900 ) / 30 }}}
{{{ 2750 / 30 = 91.67 }}}
The class average is 91.67