SOLUTION: The ratio of boys to girls in a particular class is 4 : 5. How many girls are there in a class that consists of 45 students?

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Question 627902: The ratio of boys to girls in a particular class is 4 : 5. How many girls are there in a class that consists of 45 students?
Found 2 solutions by ewatrrr, solver91311:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

The ratio of boys to girls in a particular class is 4 : 5. 

How many girlshighlight%28x%29 are there in a class that consists of 45 students?

  +4%2F5+=+%2845-x%29%2Fx  || Cross Multiply to solve for x, the # of girls

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


For every 9 students, 5 of them are girls. Divide 45 by 9 and then multiply by 5.

John

My calculator said it, I believe it, that settles it
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