probability

A company's records indicate that on any given day, 1% of their day shift
employees and 2% of the night shift employees will miss work. Sixty percent of the employees
work the day shift.

a. What percent of employees are absent on any given day?

b. A randomly selected employee missed work today, what is the probability that he/she
is a night shift employee?

i don't even know where to start

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asked by lisa
  1. percent=.01*.6 + .02*.4

    .02*.4/(.02*.4+.01*.6)

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