For Exercise 4.54, see page 195; for 4.55, see page 197; for 4.56, see page 198; for 4.57 and 4.58, see pages 198–199; for 4.59 and 4.60, see page 200; and for 4.61, see page 202.
4.60 Find the conditional probability.
Refer to Example 4.20. What is the probability that a student is part-time, given that the student is 15 to 19 years old? Explain in your own words the difference between this calculation and the one that we did in Example 4.20.