Probability in college algebra

kari_11_nicole · #1 Apr 30, 2008, 03:16 PM

I need help with this problem...

A sale representative makes a sale at approximately one-third of the offices she calls on. If, on a given day, she goes to four offices, what are the probabilities that she will make a sale at (a) all four offices?, (b) none of the offices, and (c) at least one office?

ebaines · May 1, 2008, 02:25 PM

I'll help you with the first problem. if the probability of success on any one office visit is 1/3, then the probability of being successful 4 times in a row is (1/3)*(1/3*(1/3)*(1/3).

As for the second, recall that the probability of not being succesful on any patricular office visit is 1 - P(success) = 1 - 1/3.



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