The ratio of water and flour in a bowl is 1 ∶ 3. If 4 cups so this mixture is taken out and four more cups of flour are added then the ratio of water to flour becomes 1 ∶ 7. Find the initial quantity of mixture in the bowl provided all the measurements are done using cups.
1
6 cups
2
8 cups
3
12 cups
4
15 cups
5
16 cups