Question
PSLE
Kathy has a number of notebooks in three colours: blue, red and orange. 15 of the notebooks are blue. The number of blue notebooks is thrice the number of red notebooks. What fraction of the notebooks is orange?
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PSLE
Kathy has a number of notebooks in three colours: blue, red and orange. 15 of the notebooks are blue. The number of blue notebooks is thrice the number of red notebooks. What fraction of the notebooks is orange?