Question
PSLE
A bag contains cards of three different colours. 13 of the cards are purple. The ratio of the number of blue cards to that of green cards is 9 : 1. What is the ratio of the number of blue cards to that of purple cards?
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PSLE
A bag contains cards of three different colours. 13 of the cards are purple. The ratio of the number of blue cards to that of green cards is 9 : 1. What is the ratio of the number of blue cards to that of purple cards?