Question 386341
show all work. 
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twenty percent of american households own three or more cars. 
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a random of 100 american households is selected. let x be the number of households selected that own three or more cars
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the probability that at least 30 of the households selected own at least 3 or more cards is ?
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Binomial Problem with n=100 and p = 0.20
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P(30<= x <=100) = 1 - P(0<= x <=29) 
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= 1 - binomcdf(100,0.2,29) 
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= 0.01125
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Cheers,
Stan H.