Sheet # 441
Name_________________________Date:_____________
Explain and Show Your Work.
1) In math, Kate earned an 82 on the first test, another 82 on the second test, a 76 on the third test, and a 92 on the fourth test. What score does she need to get on the fifth test to end up with a five-test mean of 86?
2) In the "Computer Graphics" class, there are 12 boys and 18 girls. If the class mean score on a test is 90 and the boys' mean score is 87, what is the girls' mean score?
Answers for sheet # 439
1) 98
2) Total score of 30 students: 30 x 90 = 2700
Total score of 12 boys: 12 x 87 = 1044
Total score of 18 girls = 2700 - 1044 = 1656
Mean score of 18 girls = 1656/18 = 92