(Answered) Question 1 two hundred persons buy tickets for a drawing

Statistics

Question: 1. Two hundred persons buy tickets for a drawing. Each ticket has probability 0.008 of winning. What is the probability of k or fewer winners, k = 2; 3; 4?

2. Two coins are flipped twenty times. What is the probability the results match (both heads or both tails) k times, 0 ≤ k ≤ 20?

3. Thirty members of a class each flip a coin ten times. What is the probability that at least five of them get seven or more heads?

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