SOLUTION: a student score 65 and 82 on two different 100-point tests.if the maximum scoe on the next test is also 100 points,what score does the student need to maintain atleast an average o

Algebra ->  Average -> SOLUTION: a student score 65 and 82 on two different 100-point tests.if the maximum scoe on the next test is also 100 points,what score does the student need to maintain atleast an average o      Log On


   

Question 752605: a student score 65 and 82 on two different 100-point tests.if the maximum scoe on the next test is also 100 points,what score does the student need to maintain atleast an average of 70?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
student scored 65 and 82 on 2 different tests.

student wants an overall average of 70 on 3 tests.

total score on the 3 tests would have to be 3 * 70 = 210.

65 + 82 + x = 210

x = 210 - 65 - 82

x = 60

student needs to score 60 on the third test in order to achieve an overall average of 70.

60 + 65 + 85 = 210 / 3 = 70

anything above 60 on the third test will naturally be better.