Question
PSLE
A box contained grey beads and white beads. 60% of the beads were white. After some black beads were added to the box, 27% of the beads were white. What percentage of the beads in the box were black?
2 m

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PSLE
A box contained grey beads and white beads. 60% of the beads were white. After some black beads were added to the box, 27% of the beads were white. What percentage of the beads in the box were black?