SOLUTION: in a class there are 6 more girls than boys, and the ratio of boys to girls is 2 to 5 how many students are there in this class

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: in a class there are 6 more girls than boys, and the ratio of boys to girls is 2 to 5 how many students are there in this class       Log On


   



Question 830957: in a class there are 6 more girls than boys, and the ratio of boys to girls is 2 to 5
how many students are there in this class

Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
b for boys; g for girls.

g=b%2B6; and b%2Fg=2%2F5;

Ratio gives b=2g%2F5
Substitute into the first equation:
g=2g%2F5%2B6
5g=2g%2B30
3g=30
highlight_green%28g=10%29
.
You know how to continue and finish?