SOLUTION: Two-fifth of the students in a mixed school are boys.If there are thirty girls in the school, how many are boys?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Two-fifth of the students in a mixed school are boys.If there are thirty girls in the school, how many are boys?      Log On


   

Question 477809: Two-fifth of the students in a mixed school are boys.If there are thirty girls in the school, how many are boys?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Two-fifth of the students in a mixed school are boys. (3/5 are girls)

thirty girls: (3/5)C = 30, C = 50.  There are 20 boys  (2/5)50 = 20