Answer:
Cafe A
1:10
5 free drinks
Cafe B
3:25
6 free drinks
Explanation:
Cafe A
Cafe A offers 2 free bottled waters or juices for every 20 purchased. The ratio of free drinks to purchased ones is 2:20 = 1:10.
If you purchase 50 drinks, the free drinks will be:
50 purchased × (1 free / 10 purchased) = 5 free
Cafe B
Cafe B offers 3 free bottles waters or juices for every 25 purchased. The ratio of free drinks to purchased ones is 3:25.
If you purchase 50 drinks, the free drinks will be:
50 purchased × (3 free / 25 purchased) = 6 free