To find the number of people who prefer the seaside or an island, we need to add the values for the seaside and the island from both activities (hiking and swimming).
From the table:
-
Seaside:
- Hiking: 20
- Swimming: 53
Total for Seaside = 20 + 53 = 73
-
Island:
- Hiking: 12
- Swimming: 40
Total for Island = 12 + 40 = 52
Now, we can add the totals for the seaside and the island together:
Total for Seaside or Island = Total for Seaside + Total for Island = 73 + 52 = 125
So, the number of people who prefer the seaside or an island is 125.