SOLUTION: In her morning class, the computer teacher has 20 students, 8 of whom are women and 12 of whom are men. If her afternoon class has 30 students, how many of them must be women so t

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Question 35629This question is from textbook
: In her morning class, the computer teacher has 20 students, 8 of whom are women and 12 of whom are men. If her afternoon class has 30 students, how many of them must be women so that both classes have the same ratio of women to men? This question is from textbook

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
The ratio of girls in morning is; 2%2F5
The ratio of boys in morning is; 3%2F5
So we need the same ratio in the afternoon;
2%2F5= x%2F30
cross multiply;
5x=60
x=12
So the ratio of girls will be=12%2F30=2%2F5
Now boys;
3%2F5=x%2F30
5x=90
x=18
So the ratio of boys=18%2F30=3%2F5
So we need ;
12 girls and 18 boys
=)