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n a classroom full of boys and girls,

if 3 boys leave, there will be 4 times as many boys left as girls;
if 3 girls leave, there will be 9 times as many boys left as girls;
if 3 boys and 3 girls leave, there will be ? times as many boys left as girls.

 Jul 26, 2020
 #1
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1 - There are 27 boys and  6 girls in Classroom

 

2 - 3 boys leave =24 boys and 6 girls left =ratio of 4 boys to 1 girl

 

3 - 3 girls leave =27 boys and 3 girls left =ratio of 9 boys to 1 girl

 

4 - 3 boys and 3 girls leave =24 boys and 3 girls left =ratio of 8 boys to 1 girl.

 Jul 26, 2020
 #2
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B = Boys
G =Girls
(B - 3) / G = 4,   B / (G - 3)=9, solve for B, G
B = 27   and    G = 6
27 - 3 = 24   and   6 - 3 = 3
24 / 3 = 8 - Ratio of Boys to Girls

 Jul 26, 2020

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