The probability that a convenience store has no iced tea is 50%. If Karl is stopping by 3 convenience stores on his way to work, what is the probability that at least one of the stores will not have a can of iced tea?
Even if question is: atleast one of the stores will have
a can of iced tea
then the answer remains same. Isn't it?
Can anybody tell that?
Yes it is. 1-1/2^3=7/8. As the probabilities of having and not having the iced tea are 1/2, any "mirror" cases will have the same probabilities.