Question
PSLE
A bag contains erasers of three different colours. 19 of the erasers are blue. The ratio of the number of orange erasers to that of brown erasers is 3 : 7. What is the ratio of the number of blue erasers to that of brown erasers?
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PSLE
A bag contains erasers of three different colours. 19 of the erasers are blue. The ratio of the number of orange erasers to that of brown erasers is 3 : 7. What is the ratio of the number of blue erasers to that of brown erasers?