Question
PSLE
A bag contains cards of three different colours. 15 of the cards are red. The ratio of the number of purple cards to that of blue cards is 3 : 4. What is the ratio of the number of red cards to that of blue cards?
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PSLE
A bag contains cards of three different colours. 15 of the cards are red. The ratio of the number of purple cards to that of blue cards is 3 : 4. What is the ratio of the number of red cards to that of blue cards?