Can someone help me with the average pH? I am not sure if I’m just supposed to add all the pH value and divide it after. I know how to work the other problems but I would like to compare it and see if I did it right.

pH value for A-1: 12.23 A-2: 12.19 B-1: 11.52 B-2:11.52 C-1: 8.57 C-2: 8.59