SOLUTION: The mean on an exam taken by 30 students was calculated to be 76. Another class of 42 students took the same exam and their mean was 72. What is the mean for both classes combine

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Question 946212: The mean on an exam taken by 30 students was calculated to be 76. Another class of 42 students took the same exam and their mean was 72. What is the mean for both classes combined?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
S%5B1%5D%2F30=76
S%5B1%5D=2280
.
.
S%5B2%5D%2F42=72
S%5B2%5D=3024
So then,
A%5B3%5D=%28S%5B1%5D%2BS%5B2%5D%29%2F%2830%2B42%29=%285304%29%2F%2872%29=73%262%2F3