Question
PSLE
A box contained black balls and blue balls. 40% of the balls were blue. After some green balls were added to the box, 16% of the balls were blue. What percentage of the balls in the box were green?
2 m

Click button first when a symbol is required. X

PSLE
A box contained black balls and blue balls. 40% of the balls were blue. After some green balls were added to the box, 16% of the balls were blue. What percentage of the balls in the box were green?