Question
PSLE
A box contained yellow balls and white balls. 40% of the balls were white. After some gold balls were added to the box, 30% of the balls were white. What percentage of the balls in the box were gold?
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PSLE
A box contained yellow balls and white balls. 40% of the balls were white. After some gold balls were added to the box, 30% of the balls were white. What percentage of the balls in the box were gold?