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 he will not be able to buy a can of iced tea?
what is the correct way of solving this?
--> (1/2)(1/2)(1/2) = 1/8
--> 1-(1/2)(1/2)(1/2) = 7/8
I often get confused when to use 1 - (probability of x not happening) vs just multiplying the probability that an even happens x times.
Anyone care to give their thoughts?
Impossible is nothing