PSLE Sabrina had 75 post-it notes and Winnie had 10 post-it notes. After Sabrina gave some of her post-it notes to Winnie, the number of post-it notes Sabrina and Winnie had was in the ratio 2 : 3. How many post-it notes did Winnie have in the end?
|
Sabrina |
Winnie |
Total |
Before |
75 |
10 |
85 |
Change |
- ? |
+ ? |
|
After |
2 u |
3 u |
5 u |
Total number of post-it notes
= 75 + 10
= 85
Total number of post-it notes
= 2 u + 3 u
= 5 u
5 u = 85
1 u = 85 ÷ 5 = 17
Number of post-it notes that Winnie had in the end
= 3 u
= 3 x 17
= 51
Answer(s): 51