SOLUTION: in a group of 25 batteries five are deead.Choose 2 batteries at random create a probabilty model for the number of good batteries

Question 478177: in a group of 25 batteries five are deead.Choose 2 batteries at random
create a probabilty model for the number of good batteries
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
in a group of 25 batteries five are dead. Choose 2 batteries at random
create a probabilty model for the number of good batteries
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Binomial Problem with n = 2 and p = 1/5
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P(x = 0 dead) = (4/5)^2 = 16/25
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P(x = 1 dead) = 2C1(1/5)(4/5) = 8/25
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P(x = 2 dead) = (1/5)^2 = 1/25
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Cheers,
Stan H.
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