Fiona and Marion have 200 coins altogether. Marion has thrice as many coins as Fiona. How many coins must Marion give to Fiona so that they have the same number of coins?
| |
Fiona |
Marion |
Total |
| Before |
1 u |
3 u |
200 |
| Change |
+ ? |
- ? |
|
| After |
100 |
100 |
200 |
Total number of coins that Fiona and Marion have
= 1 u + 3 u
= 4 u
4 u = 200
1 u = 200 ÷ 4 = 50
Number of coins that Fiona and Marion each has in the end
= 200 ÷ 2
= 100
Number of coins that Marion must give to Fiona
= 100 - 50
= 50
Answer(s): 50
