SOLUTION: The ratio of boys to girls in a class is 4 : 5. There are 3 more girls than boys. Calculate the total number of students in the class.

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: The ratio of boys to girls in a class is 4 : 5. There are 3 more girls than boys. Calculate the total number of students in the class.      Log On


   



Question 916526: The ratio of boys to girls in a class is 4 : 5.
There are 3 more girls than boys.
Calculate the total number of students in the class.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x the number of boys
x%2F%28x%2B3%29+=+4%2F5 Cross Multiplying to solve
4(x+3) = 5x
12 = x, number of boys and 15 Girls 12%2B3
15 students in the class
....
And...checking
12/15 = 4/5