The Student Room Group

Ratio

The ratio boys: girls in a stadium is 5: 2
4 boys leave and the ratio becomes 2: 1
Work out how many girls there are in the stadium.
Reply 1
Original post by Marinate
The ratio boys: girls in a stadium is 5: 2
4 boys leave and the ratio becomes 2: 1
Work out how many girls there are in the stadium.
what have you tried so far?
Reply 2
Original post by chavvo
what have you tried so far?
nothing
Reply 3
Let the number of students be x hence boys are 5x and girls are 2x
(5x-4)/2x = 2/1
X =4
Hence girls are 8
Reply 4
Original post by Mark-n
Let the number of students be x hence boys are 5x and girls are 2x
Please remove the details of your post - it's against forum rules to post full solutions. Thanks :smile:
(edited 1 month ago)
8 girls maybe?
Reply 6
Original post by Marinate
nothing
we don't do your homework for you!

Let b be the original number of boys and let g be the original number of girls, then try to formulate some equations relating b and g given the information given.

Post back if you're still stuck :smile:

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