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telephone survey uses a random digit dialing machine to call subject. The machine is expected to reach a live person 15% of the time. In

telephone survey uses a random digit dialing machine to call subject. The machine is expected to reach a live person 15% of the time. In eight attempts:

(1) What is the probability of achieving exactly 3 successful calls?

(2) What is the probability of 2 or fewer successful calls?

(3)What is the probability of 3or moresuccessful calls

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