Question
PSLE
A bag contains marbles of three different colours. 13 of the marbles are yellow. The ratio of the number of brown marbles to that of purple marbles is 1 : 3. What is the ratio of the number of brown marbles to that of yellow marbles?
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PSLE
A bag contains marbles of three different colours. 13 of the marbles are yellow. The ratio of the number of brown marbles to that of purple marbles is 1 : 3. What is the ratio of the number of brown marbles to that of yellow marbles?