Maintenance Planning: In a large hotel, the maintenance department is responsible for repairing anything that breaks in the rooms. The hotel distinguishes two types of repair jobs: electrical and mechani cal. Suppose that 1/3 of the jobs are electrical and the rest mechanical, independent of each other job. 3
a) Assume that there were 48 jobs today. Calculate the probability that exactly 10 of those jobs were electrical in nature. (Hint: Use binomial distribution)
b) Assume that there were 48 jobs today. Calculate the probability that at least 20 of those jobs were mechanical in nature. (Hint: Use binomial distribution)