SOLUTION: Thirteen percent of people are left handed. You randomly select 8 persons and ask them if they are left-handed. Find the probability that (a) exactly 1 person are left handed (b)

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Question 108363: Thirteen percent of people are left handed. You randomly select 8 persons and ask them if they are left-handed. Find the probability that (a) exactly 1 person are left handed (b) at least 1 persons are left handed, and (C) less than 1 are left handed.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Thirteen percent of people are left handed. You randomly select 8 persons and ask them if they are left-handed.
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Note: Probability a person is not left handed = 0.87
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Find the probability that
(a) exactly 1 person are left handed
P(x=1) = 13C1(0.13)^1(0.87)^7 = 0.63756...
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(b) at least 1 persons are left handed,
P(x>=1) = 1 - P(x=0)
= 1 - 0.87^ 8 = 0.6717883...
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(c) less than 1 are left handed.
P(x=0) = 0.87^8 = 0.328211..
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Cheers,
Stan H.