A grocery store uses cashiers, stock clerks, and deli personnel. The distribution of employees according to marital status is shown below.
Married = cashiers: 8, stock clerks: 12, deli personnel : 3
not married = cashiers: 5, stock clerks: 15, deli personnel: 2
a.) A person is chosen at random. Determine the probability that given that person is married, he or she is stock clerk. Provide your answer as a fraction or as number rounded to three decimal places.
b.) Find out the probability that the person is not married.