Question 897998
 (52+64+70+ 53)*.20=47.8
72*.10=7.2

47.8+7.2=55
64.5-55=9.5
.10*95=9.5
He needs 95 get 64.5

Not too surprising!
He failed three out of 4 marking periods.
His highest grade has been 72.
There is basically no chance that he will pass.