Question
PSLE
The number of girls and boys in a canteen were in the ratio 2 : 7. After 12 girls entered the canteen and half the number of boys left the canteen, the ratio of the number of girls to boys became 1 : 1. How many children were there in the canteen at first?
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PSLE
The number of girls and boys in a canteen were in the ratio 2 : 7. After 12 girls entered the canteen and half the number of boys left the canteen, the ratio of the number of girls to boys became 1 : 1. How many children were there in the canteen at first?