SOLUTION: A random variable follows a binomial distribtuion with a probability of success equal to 0.45. For n = 11, find a. the probability of exactly 1 success b. the probability of 4 or

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Question 859132: A random variable follows a binomial distribtuion with a probability of success equal to 0.45. For n = 11, find
a. the probability of exactly 1 success
b. the probability of 4 or fewer successes
c. the probablity of at least 8 successes
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

p = .45,  n = 11

P(x = 1) = binompdf(11, .45, 1)= .0125

P(x ≤ 4) =  binomcdf(11, .45, 4)= .3971

P(x ≥ 4) = 1 – P(x ≤ 3) = 1 - binomcdf(11, .45, 3)= .8089