Gem had 135 pencils.
23 of them were pink pencils and the rest were green pencils. After she had given away some pink pencils, the ratio of the number of pink pencils to the number of green pencils became 3 : 5. How many pencils did she have in the end?
| |
Pink |
Green |
Total |
| Before |
2x5 =
10 u |
1x5 =
5 u |
3x5 =
15 u |
| Change |
- 7 u |
|
|
| After |
3 u |
5 u |
8 u |
The number of green pencils remained unchanged.
LCM of 1 and 5 = 5
Total number of pencils at first = 15 u
15 u = 135
1 u = 135 ÷ 15 = 9
Number of pencils that Gem had in the end
= 3 u + 5 u
= 8 u
= 8 x 9
= 72
Answer(s):72
