Suppose that there are 100 MBA students in the first-year class. Of these students, 20 of them have two years work experience, 30 have three years work experience, 15 have four years, and 35 have five or more years of work experience. Suppose that a first-year MBA student is selected at random.
a) What is the probability that this student has at least for years of work experience.
b) Suppose that you are told that this student has at least three years of work experience. What is the conditional probability that this student has at least for years of work experience.