Answer:
6
Step-by-step explanation:
You want to know how many chairs are usually around the table if 1 chair must be added to accommodate Mr. and Mrs. DiNapoli and their two sons and three daughters.
The number present for a family dinner is ...
1 (Mr. DiNapoli) +1 (Mrs. DiNapoli) +2 (sons) +3 (daughters) = 7
If one chair is added to make 7, then there are usually ...
7 - 1 = 6 . . . . chairs at the table