SOLUTION: A survey found that 77% of bike riders sometimes ride without a helmet. If 4 bike riders are randomly selected, find the probability that at least one of the riders does not wear a
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Question 1130761: A survey found that 77% of bike riders sometimes ride without a helmet. If 4 bike riders are randomly selected, find the probability that at least one of the riders does not wear a helmet all the time.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A survey found that 77% of bike riders sometimes ride without a helmet. If 4 bike riders are randomly selected, find the probability that at least one of the riders does not wear a helmet all the time.
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P(x>=1) + P(x=0) = 1
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P(x>=1) = 1 - 0.23^4 = 0.997
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Cheers,
Stan H.
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