Answers

2014-11-12T18:25:10+08:00
Let 'x' be the factor such that you'll have the ratio as 3x:x
Since the total number is 240 then you'll have it as:
3x + x = 240
4x = 240
x = 60
For the number of boys:
3x = 3(60)
     = 180
For the number of girls:
x = 60
Therefore there are 180 boys and 60 girls.
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2014-11-12T19:35:24+08:00
3:1= 240
4n = 240
n = 60
3*60 = 180
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