Question
PSLE
A bag contains erasers of three different colours. 15 of the erasers are orange. The ratio of the number of brown erasers to that of red erasers is 7 : 3. What is the ratio of the number of orange erasers to that of red erasers?
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PSLE
A bag contains erasers of three different colours. 15 of the erasers are orange. The ratio of the number of brown erasers to that of red erasers is 7 : 3. What is the ratio of the number of orange erasers to that of red erasers?