Question
PSLE
A box contained white beads and gold beads. 30% of the beads were gold. After some black beads were added to the box, 15% of the beads were gold. What percentage of the beads in the box were black?
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PSLE
A box contained white beads and gold beads. 30% of the beads were gold. After some black beads were added to the box, 15% of the beads were gold. What percentage of the beads in the box were black?