Question
PSLE
A box contained gold balls and yellow balls. 60% of the balls were yellow. After some white balls were added to the box, 15% of the balls were yellow. What percentage of the balls in the box were white?
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PSLE
A box contained gold balls and yellow balls. 60% of the balls were yellow. After some white balls were added to the box, 15% of the balls were yellow. What percentage of the balls in the box were white?