Question 560758
 In a particular suburb, 50% of the households have installed electronic security systems. 
a. If a household is chosen at random from this suburb, what is the probability that this household has not installed an electronic security system?:::1/2
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b. If two households are chosen at random from this suburb, what is the probability that neither has installed an electronic security system?::
(1/2)^2 = 1/4
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Cheers,
Stan H.
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