Winnie and Sabrina have 160 coins altogether. Sabrina has thrice as many coins as Winnie. How many coins must Sabrina give to Winnie so that they have the same number of coins?
| |
Winnie |
Sabrina |
Total |
| Before |
1 u |
3 u |
160 |
| Change |
+ ? |
- ? |
|
| After |
80 |
80 |
160 |
Total number of coins that Winnie and Sabrina have
= 1 u + 3 u
= 4 u
4 u = 160
1 u = 160 ÷ 4 = 40
Number of coins that Winnie and Sabrina each has in the end
= 160 ÷ 2
= 80
Number of coins that Sabrina must give to Winnie
= 80 - 40
= 40
Answer(s): 40
