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

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