Question
PSLE
A bag contains marbles of three different colours. 12 of the marbles are purple. The ratio of the number of orange marbles to that of brown marbles is 4 : 5. What is the ratio of the number of purple marbles to that of brown marbles?
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PSLE
A bag contains marbles of three different colours. 12 of the marbles are purple. The ratio of the number of orange marbles to that of brown marbles is 4 : 5. What is the ratio of the number of purple marbles to that of brown marbles?