Question
PSLE
A box contained brown balls and yellow balls. 60% of the balls were yellow. After some grey balls were added to the box, 33% of the balls were yellow. What percentage of the balls in the box were grey?
2 m

Click button first when a symbol is required. X

PSLE
A box contained brown balls and yellow balls. 60% of the balls were yellow. After some grey balls were added to the box, 33% of the balls were yellow. What percentage of the balls in the box were grey?