PSLE Wendy had 47 bookmarks and Lucy had 23 bookmarks. After Wendy gave some of her bookmarks to Lucy, the number of bookmarks Wendy and Lucy had was in the ratio 2 : 5. How many bookmarks did Lucy have in the end?
|
Wendy |
Lucy |
Total |
Before |
47 |
23 |
70 |
Change |
- ? |
+ ? |
|
After |
2 u |
5 u |
7 u |
Total number of bookmarks
= 47 + 23
= 70
Total number of bookmarks
= 2 u + 5 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of bookmarks that Lucy had in the end
= 5 u
= 5 x 10
= 50
Answer(s): 50