Abi had 108 pens.
23 of them were yellow pens and the rest were green pens. After she had given away some yellow pens, the ratio of the number of yellow pens to the number of green pens became 5 : 6. How many pens did she have in the end?
|
Yellow |
Green |
Total |
Before |
2x6 = 12 u |
1x6 = 6 u |
3x6 = 18 u |
Change |
- 7 u |
|
|
After |
5 u |
6 u |
11 u |
The number of green pens remained unchanged.
LCM of 1 and 6 = 6
Total number of pens at first = 18 u
18 u = 108
1 u = 108 ÷ 18 = 6
Number of pens that Abi had in the end
= 5 u + 6 u
= 11 u
= 11 x 6
= 66
Answer(s):66