PSLE A box contained yellow beads and black beads. 60% of the beads were black. After some pink beads were added to the box, 33% of the beads were black. What percentage of the beads in the box were pink?
|
Black |
Yellow |
Pink |
Total |
Before |
3 u |
2 u |
|
5 u |
Change |
|
|
+ ? |
|
After |
33% |
22% |
|
100% |
60% =
60100 =
35 The number of black beads remains unchanged.
3 u → 33%
1 u → 33% ÷ 3 = 11%
2 u → 2 x 11 = 22%
Percentage of the beads in the box that were pink
= 100% - 33% - 22%
= 45%
Answer(s): 45%