Question

Suppose 40% of people smoke in public. If there are 5 people in a park on...

Suppose 40% of people smoke in public. If there are 5 people in a park on one Sunday.

a. What is the probability that at least one of them will not be smoking? Show your work in the following steps:
i. What is your variable of interest. Write it in words.
ii. What distribution does your variable follow? What are its parameters?
iii. Write your probability statement, the formula you will use with the values plugged in, and your final answer.

b. If you know that at least one of the five people is not going to be smoking, what is the probability that at least two of the five people will, in fact, not be smoking?
Write the probability statement and show me the steps as you calculate your final answer.

Math   Statistics-And-Probability   
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