Question
PSLE
A box contains green, yellow and black marbles. 38 of the marbles are green. 18 of the remaining marbles are yellow. What fraction of the marbles in the box are black?
2 m

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PSLE
A box contains green, yellow and black marbles. 38 of the marbles are green. 18 of the remaining marbles are yellow. What fraction of the marbles in the box are black?