SOLUTION: In a shipment of 50 calculators, 5 are known to be defective. If 6 calculators are picked at random, what is the probability that 2 are defective?

Question 839297: In a shipment of 50 calculators, 5 are known to be defective. If 6 calculators are picked at random, what is the probability that 2 are defective?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

Note: The probability of x successes in n trials is: 

P = nCx*  where p and q are the probabilities of success and failure respectively. 

In this case p(defective)= .1 & q = .9

nCx = 

If 6 calculators are picked at random, what is the probability that 2 are defective

 P = 6C2 (.1)^2(.9)^4 = .0984

 

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