Answer :
(96+92+80+91+86+x)= 90
________________
6
(445+x)=90
_____
6
then you multiply 6 on both sides
445+×=540
-445. -445
x= 95
they need a 95 percent to have an average of a 90%.
________________
6
(445+x)=90
_____
6
then you multiply 6 on both sides
445+×=540
-445. -445
x= 95
they need a 95 percent to have an average of a 90%.