3 years ago

In a class of 18 there are 2 girls for every 1 boy. how many girls are there?

2 answers:

7 0

2 girls = 1 boy
12 girls = 6 boys
12 + 6 = 18
girls = 12

dsp733 years ago

3 0

X-girls y-boys

if x+y=18 and 2x=y then

x+2x=18
3x=18
x=6

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