SOLUTION: In San Francisco 30% of workers take public transportation daily ( USA Today, Decmber 21, 2005). a. In a sample of 10 workers, what is the probability that exactly three workers

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Question 525979: In San Francisco 30% of workers take public transportation daily ( USA Today, Decmber 21, 2005).
a. In a sample of 10 workers, what is the probability that exactly three workers take public transportation daily?
b. In a sample of 10 workers, what is the probability that at least three workers take public transportation daily?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a) x=.3, y=.7, n=10
nCr=n!/(n-r)!*r!
10C3*x^3*y^7
=.2668
.
Ed