SOLUTION: The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. What's the average score for the Female students?

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Question 1094323: The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. What's the average score for the Female students?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The average score for a class of 30 students was 75.
The 20 male students in the class averaged 70.
What's the average score for the Female students?
:
let a = the average score of the girls of which there are 30 - 20 = 10
:
%28%2820%2870%29%2B+10a%29%29%2F30 = 75
1400 + 10a = 30(75)
10a = 2250 - 1400
a = 850%2F10
a = 85 is average score for the girls