SOLUTION: the average of cathys 4 test results so far this year is 65% a) what is the total of all 4 test marks? b) cathy would like to raise her average mark to 70%. what must she get n

Question 666002: the average of cathys 4 test results so far this year is 65%
a) what is the total of all 4 test marks?
b) cathy would like to raise her average mark to 70%. what must she get n her next test to achieve her goal?
Answer by lynnlo(4176) (Show Source): You can put this solution on YOUR website!
4test scores================65+65+65+65=260
divided by 4 test =======65% average
she needs to make a 90 on next test to have an average of 70
65+65+65+65+90=350 divided by 5=========70
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