Venn diagrams question

Question

Two hundred fifty-five teachers were surveyed regarding their plans for the upcoming weekend. The results were as follows:

117	plan to grade papers
109	plan to attend a football game
112	plan to do household chores
25	plan to grade papers and attend a football game
61	plan to grade papers and do household chores
42	plan to attend a football game and do household chores
12	plan to grade papers, attend a football game, and do household chores

1. How many planned to only grade papers?
2. How many planned to grade papers or do household chores?
3. How many did not plan to do any of these activities?
4. How many planned to do at lease two of these activities?
5. How many planned to attend a football game and do household chores, but did not have any plans to grade?
6. How many planned to attend a football game or grade papers, but did not plan to do household chores?
7. How many planned to do at most one of these activities?

Answer 1