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3 years ago

There are 375 seniors in harris high school. The ratio of boys to girls is 7:10. How many girls are in the senior class?

Mathematics

2 answers:

Natalka [10]3 years ago

4 0

125? Girls
Are
In
The
Senior class

iogann1982 [59]3 years ago

4 0

There are 357 seniors in Harris High School. The ratio of boys to girls is 7:10. How many boys are in the senior class?
210
147
117
107

(Scroll Down for Answer!)
Let x=# of boys and y=# of girls

Because "There are 357 seniors", this means that . Solving for "y", we get

Since "The ratio of boys to girls is 7:10", this tells us that we have the ratio:

Start with the given equation

Plug in

Cross multiply

Distribute.

Subtract from both sides.

Subtract from both sides.

Combine like terms on the left side.

Divide both sides by to isolate .

Reduce. So there are 147 boys

Go back to the isolated equation

Plug in

Subtract. So there are 210 girls

----------------------------------------------------------------------

Answer:

So there are 147 boys and 210 girls

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