SOLUTION: There are 105 students in 4th grade. The boys outnumber the girls 5 to 2. How many boys are there and how many girls are there?

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Question 942614: There are 105 students in 4th grade. The boys outnumber the girls 5 to 2. How many boys are there and how many girls are there?
Found 2 solutions by Edwin McCravy, macston:
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
The boys outnumber the girls 5 to 2.

That means on the average, out of every 5+2=7 students, 
5 of them are boys and 2 of them are girls.  That means 

5/7ths of the 105 students are boys. 

and 

2/7ths of the 105 students are girls.

5%2F7%22%D7%22105%22%22=%22%22matrix%281%2C2%2C75%2Cboys%29

You can either get the number of girls by:

1.  Subtracting 105-75 = 30 girls

or

2. 2%2F7%22%D7%22105%22%22=%22%22matrix%281%2C2%2C30%2Cgirls%29

Edwin

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
(5/7)(100%)=per cent boys=71.4%
(2/7)(100%)=percent girls=28.6%
Number of boys=105(.714)=75 boys
Number of girls=105(.286)=30 girls