Question

A survey of 516 adults aged 18-24 year olds was conducted in which they were asked what they did last Friday night. It found:

• 163 hung out with friends
• 194 ate pizza
• 28 watched TV and ate pizza, but did not hang out with friends
• 38 watched TV and hung out with friends, but did not eat pizza
• 32 hung out with friends and ate pizza, but did not watch TV
• 45 watched TV, hung out with friends, and ate pizza
• 68 did not do any of these three activities

How may 18-24 year olds (of these three activities) only watched TV last Friday night?

Answer 1