70% of college students drink alcohol. You randomly select 13 college student and ask each if he/she drinks alcohol. Find the probability that the number who say they drink alcohol is: Answer: a) Exactly 10 b) At least 5 c) Fewer than 4 d) At least 11 e) At most 4 f) More than 4 g) Between 3 and 5 inclusively h) Exactly 13 身

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