SOLUTION: You have 50 microwaves. Out of the 50 you have 4 defective ones. What is the probability that 2 out of the first 5 microwaves sold are defective? and how do I set up the equation?

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Question 144311: You have 50 microwaves. Out of the 50 you have 4 defective ones. What is the probability that 2 out of the first 5 microwaves sold are defective? and how do I set up the equation?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You have 50 microwaves. Out of the 50 you have 4 defective ones. What is the probability that 2 out of the first 5 microwaves sold are defective? and how do I set up the equation?
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This is a binomial distribution problem.
P(defective) = 4/50
P(not defective) = 46/50
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P(2 of 5 are defective) = 5C2*(4/50)^2*(46/50)^3 = 0.049836...
Cheers,
Stan H.