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tickets

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zeini
 
Reply Sat 9 Jun, 2012 08:07 pm
a. The Department of Transportation for a city has found that 30% of all parking tickets that have been
issued have not been paid within one month of issue. The Department takes a random sample of 25
parking tickets that were issued one month ago.
(i) Find the probability that at least 3 tickets have not been paid.
(ii) What is the expected number of tickets that have been paid?
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