Tiger:
Win : Lost : Total
2 : 3 : 5
(x3) (x3)
6 : 9 : 15
Gull:
Win : Lost : Total
1 2 : 3
(x5) (x5)
5 : 10 : 15
Tiger →Win : Total → 6:15
Gull → Win : Total → 5:15
If both played a total of 15 games, Tiger has a 6 wins chance whereas Gull has 5 wins chance.
Answer: Tiger