Question
PSLE
A box contained gold marbles and red marbles. 70% of the marbles were red. After some yellow marbles were added to the box, 35% of the marbles were red. What percentage of the marbles in the box were yellow?
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PSLE
A box contained gold marbles and red marbles. 70% of the marbles were red. After some yellow marbles were added to the box, 35% of the marbles were red. What percentage of the marbles in the box were yellow?