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 an average of 70. what was the average
Question 328964: 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 an average of 70. what was the average score for all 50 students who took the test? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 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 an average of 70. what was the average score for all 50 students who took the test?
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Fact: average = (total points)/(# of scores)
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Junior total points: 35*80
Senior total points: 15*70
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Equation: average for 50 = (35*80+15*70)/50 = 77
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Cheers,
Stan H.
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