SOLUTION: A total of 50 juniors and seniors were given a mathematics test. the 35 juniors attained an average score of 80 while the 15 seniors attained as average of 70. What was the aver

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Question 485885: A total of 50 juniors and seniors were given a mathematics test. the 35 juniors
attained an average score of 80 while the 15 seniors attained as average of 70.
What was the average score for all 50 students who took the test?

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
it should be:

%28%2835+%2A+80%29+%2B+%2815+%2A+70%29%29+%2F+%2835+%2B+15%29

that would come out to be: (2800 + 2050) / 50 = 3850 / 50 = 77