PSLE Tina had 62 post-it notes and Xandra had 10 post-it notes. After Tina gave some of her post-it notes to Xandra, the number of post-it notes Tina and Xandra had was in the ratio 4 : 5. How many post-it notes did Xandra have in the end?
|
Tina |
Xandra |
Total |
Before |
62 |
10 |
72 |
Change |
- ? |
+ ? |
|
After |
4 u |
5 u |
9 u |
Total number of post-it notes
= 62 + 10
= 72
Total number of post-it notes
= 4 u + 5 u
= 9 u
9 u = 72
1 u = 72 ÷ 9 = 8
Number of post-it notes that Xandra had in the end
= 5 u
= 5 x 8
= 40
Answer(s): 40