SOLUTION: A sample of 4 different calculators is randomly selected from a group containing 17 that are defective and 36 that have no defects. what is the probability that atleast one of the

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Question 359201: A sample of 4 different calculators is randomly selected from a group containing 17 that are defective and 36 that have no defects. what is the probability that atleast one of the calculators is defective?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P(good)=36%2F%2817%2B36%29=36%2F53
P(bad)=17%2F%2817%2B36%29=17%2F53
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P(at least one bad)+P(none bad)=1
P(at least one bad)=1-P(non bad)
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P(none bad)=%2836%2F53%29%2836%2F53%29%2836%2F53%29%2836%2F53%29=0.21287
P(at least one bad)=1-0.21287
P(at least one bad)=highlight%280.78713%29