Problema Solution
For every girl taking classes, there are 3 boys who are taking classes. If there are 236 students taking classes, write and solve a proportion to predict the number of boys taking classes.
Answer provided by our tutors
let
g = the number of girls taking the class
b = the number of boys taking the class
For every girl taking classes, there are 3 boys who are taking classes
g : b = 1 : 3
there are 236 students taking classes
g + b = 236
g = 236 - b
plug g = 236 - b into g : b = 1 : 3
(236 - b) : b = 1 : 3 cross-multiply
3(236 - b) = b
by solving we find
b = 177 boys
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there are 177 boys taking the class.