Question
PSLE
A box contained purple balls and blue balls. 60% of the balls were blue. After some gold balls were added to the box, 39% of the balls were blue. What percentage of the balls in the box were gold?
2 m

Click button first when a symbol is required. X

PSLE
A box contained purple balls and blue balls. 60% of the balls were blue. After some gold balls were added to the box, 39% of the balls were blue. What percentage of the balls in the box were gold?