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