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Find the probability that exactly 9 own an answering machine

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  1. A survey found that 25% of pet owners had their pets bathed professionally rather than do ir themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally.
  2. In a survey, 63% of Americans said they own an answering machine. If 14 Americans are selected at random, find the probability that exactly 9 own an answering machine.

Reference no: EM132388526

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