Posted by Katherine on Wednesday, February 9, 2011 at 8:43pm.
Ratio = Boys : Girls = 4 : 3
4x = number of boys
3x = number of girls
4x - 6 = 3x
x = 6
4x = number of boys = 4 * 6 = 24
3x = number of girls = 3 * 6 = 18
If another 2 girls join the choir,
18 + 2 = 20 = new number of girls
24 = number of boys
New ratio = 24 : 20 = 6 : 5
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