Question 1019510
For 4 tests to have an average of exactly 85 we
need the total of the 4 tests to be 4*85 = 340
Lisa needs 340 - (78+80+100) , 340 - 258 = 82
Mary needs 340 - (90+92+95) = 63
Lina needs 340 - (79+80+81) = 100
Willie needs 340 - (65+ 80+ 80 ) = 115
Since the score Willie needs is above 100 he cannot achieve his goal.