SOLUTION: A box contains 25 transistors, of which 4 are known to be bad. A transistor is selected at random and tested. a) What is the probability that it is bad? b) If the first transist

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Question 895841: A box contains 25 transistors, of which 4 are known to be bad. A transistor is selected
at random and tested.
a) What is the probability that it is bad?
b) If the first transistor tests bad what is the probability that a second transistor selected
at random will also be bad?
c) If the first transistor tested is good, what is the probability that the second transistor
selected at random will be bad?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A box contains 25 transistors, of which 4 are known to be bad. A transistor is selected at random and tested.
a) What is the probability that it is bad? 4/25
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b) If the first transistor tests bad what is the probability that a second transistor selected at random will also be bad? 3/24 = 1/8
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c) If the first transistor tested is good, what is the probability that the second transistor selected at random will be bad? 4/24
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Cheers,
Stan H.
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