SOLUTION: The average of all th grades in a certain algebra test was 90%. If the average of the 8 males grade was 87% and the average females grades was 92%. How many female took the tests?
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Question 847517: The average of all th grades in a certain algebra test was 90%. If the average of the 8 males grade was 87% and the average females grades was 92%. How many female took the tests? Answer by swincher4391(1107) (Show Source):
You can put this solution on YOUR website! Let x be the number of females.
8 * 87 + 92 * x = 90 *(x+8)
92x + 696 = 90x +720
2x = 24
x = 12
