have a homework that I'm working on and my teacher said that I overcounted. Can you help me?
100 guests buy a drink/snack; 35 of them order wine, 25 order champagne, 20 order sweet snack, 15 order salty snack, 5 don't order anything. You talk to 5 people at random and find out what they bought. Find the probability that:
- at least 3 of the guests bought a drink (of any kind)
- you talk to 3 consecutive guests who bought sweet snack
- of the last 2 guests you talked to, one bought a sweet snack and one bought a salty snack (order of the last 2 does not matter)