SOLUTION: Ms Selerac calculated the test average for 30 students as 72%. Then she found two test papers she forgot to include. The average for the class including the two papers was 73%. The

Algebra ->  Finance -> SOLUTION: Ms Selerac calculated the test average for 30 students as 72%. Then she found two test papers she forgot to include. The average for the class including the two papers was 73%. The      Log On


   

Question 1123291: Ms Selerac calculated the test average for 30 students as 72%. Then she found two test papers she forgot to include. The average for the class including the two papers was 73%. The average of just the two papers, written as percent, is:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Ms Selerac calculated the test average for 30 students as 72%.
Then she found two test papers she forgot to include.
The average for the class including the two papers was 73%.
The average of just the two papers, written as percent, is:
:
Let t = total score of the two papers
%28%2830%2872%29%2Bt%29%29%2F32 = 73
2160 + t = 32 * 73
t = 2336 - 2160
t = 176
therefore
176/2 = 88% is the av of these two papers