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Employees Absent on a Chosen Work Day

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From historical records, a personnel manager of a plant has determined the distribution below for random variable X, the number of employees absent on a randomly chosen work day.
A) What is the probability that two or fewer employees are absent?
B) What is the expected number of employees absent?
C) What is the variance of the number absent?
D) What is the standard deviation?
E) What is the probability the observed number of absent employees is within 1 standard deviation of the expected value?
F) What is the probability the observed number of absent employees is within 2 standard deviations of the expected value?

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The employees absent on a chosen work day is analyzed.

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