The ratio of boys to girls at a school is 9:10. An extra 17 boys arrive and the ratio changes to 8:7. How many girls are there at the school?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
No explanations have been posted yet. Check back later!