A national polling company polled Canadians about their coffee consumption and made the following discovery: 80% of Canadians have at least one cup of coffee a day. Two Canadians are randomly chosen on a randomly chosen day. What is the probability Part (a) Suppose you are to randomly inspect three Canadians on a randomly chosen day. Compute the probability that at least two of the three has consumed at least one cup of coffee. (use four decimals) Part (b) Suppose you are to randomly pick n-Canadians until the probability that at least one of them has consumed at least one cup of coffee (on the randomly chosen day) is at least 0.99. How large must n be? n ≥ _____ (enter an integer)

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A national polling company polled Canadians about their coffee consumption and made the following discovery: 80% of Canadians have at least one cup of coffee a day. Two Canadians are randomly chosen on a randomly chosen day. What is the probability

Part (a) Suppose you are to randomly inspect three Canadians on a randomly chosen day. Compute the probability that at least two of the three has consumed at least one cup of coffee. (use four decimals)

 

 

Part (b) Suppose you are to randomly pick n-Canadians until the probability that at least one of them has consumed at least one cup of coffee (on the randomly chosen day) is at least 0.99. How large must n be?
n ≥ _____ (enter an integer)

 

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