Question
PSLE
A bag contains marbles of three different colours. 13 of the marbles are orange. The ratio of the number of green marbles to that of brown marbles is 2 : 5. What is the ratio of the number of orange marbles to that of brown marbles?
2 m

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PSLE
A bag contains marbles of three different colours. 13 of the marbles are orange. The ratio of the number of green marbles to that of brown marbles is 2 : 5. What is the ratio of the number of orange marbles to that of brown marbles?