Question
PSLE
A box contained yellow beads and black beads. 70% of the beads were black. After some silver beads were added to the box, 49% of the beads were black. What percentage of the beads in the box were silver?
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PSLE
A box contained yellow beads and black beads. 70% of the beads were black. After some silver beads were added to the box, 49% of the beads were black. What percentage of the beads in the box were silver?