Question
PSLE
A bag contains marbles of three different colours. 18 of the marbles are orange. The ratio of the number of red marbles to that of brown marbles is 1 : 3. What is the ratio of the number of red marbles to that of orange marbles?
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PSLE
A bag contains marbles of three different colours. 18 of the marbles are orange. The ratio of the number of red marbles to that of brown marbles is 1 : 3. What is the ratio of the number of red marbles to that of orange marbles?