A survey is taken of 104 people who vacationed at a
dude ranch. The following information was obtained:
15 took swimming lessons, attended the barbecue, and
bought a tour guide.
33 attended the barbecue and bought a tour guide.
31 took swimming lessons and bought a tour guide.
22 took swimming lessons but didn't attend the
barbecue.
73 took swimming lessons or bought a tour guide.
1 only bought a tour guide.
27 did none of these things.