54. Suppose the probability distribution for X = number of jobs held during the past year for students at a school is as given in the following table. No. of Jobs 1 2 ul 3 o 4 Probability ??? 0.37...

Extracted text: 54. Suppose the probability distribution for X = number of jobs held during the past year for students at a school is as given in the following table. No. of Jobs 1 2 ul 3 o 4 Probability ??? 0.37 0.29 0.15 0.05 (a) Find the probability that a randomly selected student did not hold a job in the past year. (b) Find the probability that a randomly selected student held two or fewer jobs in the past year. (c) Find the probability that a randomly selected student held at least one job during the past year. (d) Find the expected number of jobs that students held within the past year.