PSLE Joelle had 80 bookmarks and Gillian had 10 bookmarks. After Joelle gave some of her bookmarks to Gillian, the number of bookmarks Joelle and Gillian had was in the ratio 4 : 5. How many bookmarks did Gillian have in the end?
|
Joelle |
Gillian |
Total |
Before |
80 |
10 |
90 |
Change |
- ? |
+ ? |
|
After |
4 u |
5 u |
9 u |
Total number of bookmarks
= 80 + 10
= 90
Total number of bookmarks
= 4 u + 5 u
= 9 u
9 u = 90
1 u = 90 ÷ 9 = 10
Number of bookmarks that Gillian had in the end
= 5 u
= 5 x 10
= 50
Answer(s): 50