Question
PSLE
Fiona has a number of notebooks in three colours: orange, red and brown. 13 of the notebooks are orange. The number of orange notebooks is four times the number of red notebooks. What fraction of the notebooks is brown?
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PSLE
Fiona has a number of notebooks in three colours: orange, red and brown. 13 of the notebooks are orange. The number of orange notebooks is four times the number of red notebooks. What fraction of the notebooks is brown?