Question
PSLE
A bag contains marbles of three different colours. 16 of the marbles are orange. The ratio of the number of blue marbles to that of red marbles is 2 : 1. What is the ratio of the number of orange marbles to that of red marbles?
2 m

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PSLE
A bag contains marbles of three different colours. 16 of the marbles are orange. The ratio of the number of blue marbles to that of red marbles is 2 : 1. What is the ratio of the number of orange marbles to that of red marbles?