A company is in the business of finding addresses of long-lost friends. The company claims to have a 80% success rate. Suppose that you have the names of nine friends for whom you have no addresses and decide to use the company to track them. (a) Make a histogram showing the probability of r = 0 to 9 friends for whom an address will be found. 0.3 0.25 0.25 0.2 0.2 0.15 - P(r) P() 0.15 0.1 0.1 0.05- 0.05 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 r. 0.25 0.2 0.3 0.15 P() 0.2 P(r) 0.1 0.1 0.05 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 (b) Find the mean and standard deviation of this probability distribution. (Round your answer to two decimal places.) и — friends friends What is the expected number of friends for whom addresses will be found? (Round your answer to two decimal places.) friondo

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