Question

Elghteen telephones have just been recelved at an authorized service center. Slx of these telephones are cellular, slx are cordless, and the other slx are corded phones. Suppose that these components are randomly allocated the numbers 1, 2, . .. , 18 to establish the order in which they will be serviced. (Round your answers to four decimal places.) (a) What is the probability that all the cordless phones are among the first twelve to be servlced? 0498 (b) What is the probability that after servicing twelve of these phones, phones of only two of the three types remain to be serviced? 1492 (c) What is the probability that two phones of each type are among the first six serviced? 1818

Answer 1

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