Question
PSLE
Irene has a number of notebooks in three colours: orange, yellow and purple. 311 of the notebooks are orange. The number of orange notebooks is four times the number of yellow notebooks. What fraction of the notebooks is purple?
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PSLE
Irene has a number of notebooks in three colours: orange, yellow and purple. 311 of the notebooks are orange. The number of orange notebooks is four times the number of yellow notebooks. What fraction of the notebooks is purple?