SOLUTION: according to the National Hight way traffic safety Administration, 83 % of American used seat belts regularly in 2008, if four people are selected at random, find the probability t

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Question 1097551: according to the National Hight way traffic safety Administration, 83 % of American used seat belts regularly in 2008, if four people are selected at random, find the probability that

a) all for regularly used seat belts
b)all four do not regularly used seat belt
c)at least one regularly used seat belt
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P%28X%29=C%284%2CX%29%2A%280.83%29%5EX%2A%281-0.83%29%5E%284-X%29
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a) P%284%29=0.4746
b) P=P%280%29%2BP%281%29%2BP%282%29%2BP%283%29=0.5254
c) P=P%281%29%2BP%282%29%2BP%283%29%2BP%284%29=0.9992