Pamela had 140 markers.
34 of them were brown markers and the rest were pink markers. After she had given away some brown markers, the ratio of the number of brown markers to the number of pink markers became 3 : 5. How many brown markers did she give away?
| |
Brown |
Pink |
Total |
| Before |
3x5 =
15 u |
1x5 =
5 u |
4x5 =
20 u |
| Change |
- 12 u |
|
|
| After |
3 u |
5 u |
8 u |
The number of pink markers remained unchanged.
LCM of 1 and 5 = 5
Total number of markers at first = 20 u
20 u = 140
1 u = 140 ÷ 20 = 7
Number of brown markers that she gave away
= 15 u - 3 u
= 12 u
= 12 x 7
= 84
Answer(s):84
