There are 30 students in a classroom. The ratio of boys to girls is 2:3.
1 answer:
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➷ Split 30 into the ratio 2 : 3
12 : 18
12 / 18 + x = 1/5
Cross multiply:
12(5) = 1(18 + x)
60 = 18 + x
Subtract 18 from both sides:
x = 42
42 girls entered the classroom
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