Question
PSLE
A box contained pink balls and green balls. 30% of the balls were green. After some silver balls were added to the box, 21% of the balls were green. What percentage of the balls in the box were silver?
2 m

Click button first when a symbol is required. X

PSLE
A box contained pink balls and green balls. 30% of the balls were green. After some silver balls were added to the box, 21% of the balls were green. What percentage of the balls in the box were silver?