SOLUTION: A pet supplier has a stock of parakeets of which 30% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what

Question 416946: A pet supplier has a stock of parakeets of which 30% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet?
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 =.3 and q = .7

nCx = 

P(that the pet store gets exactly one blue parakeet) = 1-P(none) = 1 - (.7)^3 

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