ACT Math 4.4 Pre-Algebra
ACT Math: Pre-Algebra Drill 4, Problem 4. Using the information given, find out how many girls attend the school.
|Foreign Language||Arabic Subtitled|
|Pre-Algebra||Ratio, proportion, and percent|
|Product Type||ACT Math|
|Ratios, Percentages, and Proportions||Ratios|
So obviously this is a GREAT school to attend if you're a boy who likes going out Saturday nights.
It's a simple ratio problem. The problem tells us that the boys to girls ratio is:
3x boys and 4x girls. Meaning... there are more girls than boys...
It also gives the TOTAL number of students, which is 245.
There's a simple ratio here. 4 out of 7 students are girls.
So the ratio is "4 is to 7 as x is to 245."
To get the answer, we cross multiply to get 7x equals 4 times 245...
...or 7x equals 980.
To solve for x... which is the number of boys in the school... we divide both sides by 7
to get x = 140.
The answer is E.
As in, "Edwina."