Question
PSLE
Lucy has a number of pens in three colours: red, yellow and blue. 18 of the pens are red. The number of red pens is twice the number of yellow pens. What fraction of the pens is blue?
2 m

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PSLE
Lucy has a number of pens in three colours: red, yellow and blue. 18 of the pens are red. The number of red pens is twice the number of yellow pens. What fraction of the pens is blue?