Question
PSLE
A bag contains coins of three different colours. 15 of the coins are yellow. The ratio of the number of green coins to that of red coins is 1 : 9. What is the ratio of the number of green coins to that of yellow coins?
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PSLE
A bag contains coins of three different colours. 15 of the coins are yellow. The ratio of the number of green coins to that of red coins is 1 : 9. What is the ratio of the number of green coins to that of yellow coins?