Question

In 7th grade there are 58 students with red-hair and 609 students with another color hair. The numbers of red-haired students in 8th grade are proportional to the numbers in 7th. If there are 60 red-headed students in 8th grade, how many students have another color hair?

Answer 1

In 7th grade:

red-hair students =58

another color hair students =609

In 8th grade:

red-hair students =60

Let's assume

another color hair students =x

now, we are given

The numbers of red-haired students in 8th grade are proportional to the numbers in 7th

so,

$\frac{60}{58} =\frac{x}{609}$

now, we can solve for x

we get

$x=609*\frac{60}{58}$

we get

$x=630$

so, students have another color hair in 8th grade is 630.........Answer