Question
PSLE
A bag contains erasers of three different colours. 19 of the erasers are brown. The ratio of the number of green erasers to that of yellow erasers is 2 : 1. What is the ratio of the number of brown erasers to that of yellow erasers?
2 m

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PSLE
A bag contains erasers of three different colours. 19 of the erasers are brown. The ratio of the number of green erasers to that of yellow erasers is 2 : 1. What is the ratio of the number of brown erasers to that of yellow erasers?