SOLUTION: the probability that the yankees will win the World Series is 3/4. what is the probability that the yankees will win the world series at least 4 times during the next 5 years?

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Question 874719: the probability that the yankees will win the World Series is 3/4. what is the probability that the yankees will win the world series at least 4 times during the next 5 years?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

p = .75 , n = 5

P(x ≥  4) = P(4)+P(5)  0r = 1 - binompdf(5, .75,3)= .6328



Using P+%28x%29=+highlight_green%28nCx%29%28p%5Ex%29%28q%29%5E%28n-x%29+ 

p and q are the probabilities of success and failure respectively. 

In this case p= .75, q = .25  and n = 5

nCx+=+%28n%21%29%2Fx%21%28n+-+x%29%21%29 

P(4)+P(5) = 5C4(.75)^4(.25)^1 + 5C5(.75)^5(.25)^0