PSLE A box contained gold balls and pink balls. 60% of the balls were pink. After some silver balls were added to the box, 9% of the balls were pink. What percentage of the balls in the box were silver?
|
Pink |
Gold |
Silver |
Total |
Before |
3 u |
2 u |
|
5 u |
Change |
|
|
+ ? |
|
After |
9% |
6% |
|
100% |
60% =
60100 =
35 The number of pink balls remains unchanged.
3 u → 9%
1 u → 9% ÷ 3 = 3%
2 u → 2 x 3 = 6%
Percentage of the balls in the box that were silver
= 100% - 9% - 6%
= 85%
Answer(s): 85%