SOLUTION: an automobile saleswoman finds that the probability of making a sale is 0.23. If she talks to four customers today, find the probablility that she will sell four cars?

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Question 629719: an automobile saleswoman finds that the probability of making a sale is 0.23. If she talks to four customers today, find the probablility that she will sell four cars?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
Talks to four customers. p(sale) = .23
P(4 sales) = 4C4%28.23%29%5E4%28.77%29%5E0 = .0028
Note: The probability of x successes in n trials is:
P = nCx* p%5Ex%2Aq%5E%28n-x%29 where p and q are the probabilities of success and failure respectively.
In this case p = .23 and q = .77
nCx = n%21%2F%28x%21%28n-x%29%21%29