Elyse had 108 pens.
23 of them were brown pens and the rest were pink pens. After she had given away some brown pens, the ratio of the number of brown pens to the number of pink pens became 3 : 4. How many pens did she have in the end?
| |
Brown |
Pink |
Total |
| Before |
2x4 =
8 u |
1x4 =
4 u |
3x4 =
12 u |
| Change |
- 5 u |
|
|
| After |
3 u |
4 u |
7 u |
The number of pink pens remained unchanged.
LCM of 1 and 4 = 4
Total number of pens at first = 12 u
12 u = 108
1 u = 108 ÷ 12 = 9
Number of pens that Elyse had in the end
= 3 u + 4 u
= 7 u
= 7 x 9
= 63
Answer(s):63
