johnathan class has 30 boys of the students in his class 60% are girls how many girls are in johnathans class

Mathematics

1 answer:

Gekata [30.6K]3 years ago

5 0

Answer:

45 girls

Step-by-step explanation:

If 60% of the class is girls then 40% of the class is boys.

30 boys are in the class, meaning that 40% of the class comprises those 30 boys

First, we need the total number of class members: 30/x = 40/100 -> 40x=3000 -> x=3000/40 -> x=75

Now that we know the total class members, at 75, we can calculate the number of girls in the class. You can do this:

0.6*75=45

60/100=x/75 and solve for x

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