Question
PSLE
A box contained brown balls and silver balls. 60% of the balls were silver. After some blue balls were added to the box, 51% of the balls were silver. What percentage of the balls in the box were blue?
2 m

Click button first when a symbol is required. X

PSLE
A box contained brown balls and silver balls. 60% of the balls were silver. After some blue balls were added to the box, 51% of the balls were silver. What percentage of the balls in the box were blue?