Please help me on this 4 set theory, I don't know where to start.

Question

52—watched Football
56—watched Basketball
62—watched Tennis
60—watched Golf
19—watched Football and Tennis
21—watched Football and Basketball
20—watched Basketball and Tennis
27—watched Football and Golf
30—watched Basketball and Golf
21—watched Tennis and Golf
3—watched Football, Basketball and Tennis
15—watched Football, Basketball and Golf
10—watched Football, Tennis and Golf
10—watched Basketball, Tennis and Golf
3—watched all four of these sports
5—Don't watched any of these four sports.

Use a venn diagram to answer each question

(a) How many of these viewers watched Football, Basketball and Tennis but not Golf

(b) How many watched exactly one of these sport

(c) How many watched exactly two of these four sport?

Answer 1

Draw 4 circles that make your venn diagram.
Start in the middle and work your way out. That is place the 3 in the very center of the 4 connected circles : )
Remember that you will have the number 5 outside of the four circles but inside of your Universal set box : )

Answer 2

Yes I have done that but how to enter the others? I my to subtract 3 from each portion?

Answer 3

Please help me. What about the other values? I my to subtract 3 from each each value in order to get the correct sum of each circle?