Question
PSLE
A bag contains marbles of three different colours. 17 of the marbles are brown. The ratio of the number of blue marbles to that of orange marbles is 2 : 7. What is the ratio of the number of brown marbles to that of orange marbles?
2 m

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PSLE
A bag contains marbles of three different colours. 17 of the marbles are brown. The ratio of the number of blue marbles to that of orange marbles is 2 : 7. What is the ratio of the number of brown marbles to that of orange marbles?