Question
PSLE
A packet contains pink, red and black marbles. 19 of the marbles are pink. 12 of the remaining marbles are red. What fraction of the marbles in the packet are black?
2 m

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PSLE
A packet contains pink, red and black marbles. 19 of the marbles are pink. 12 of the remaining marbles are red. What fraction of the marbles in the packet are black?