Question
PSLE
A box contained silver balls and brown balls. 40% of the balls were brown. After some pink balls were added to the box, 30% of the balls were brown. What percentage of the balls in the box were pink?
2 m

Click button first when a symbol is required. X

PSLE
A box contained silver balls and brown balls. 40% of the balls were brown. After some pink balls were added to the box, 30% of the balls were brown. What percentage of the balls in the box were pink?