For Exercises 4.14 and 4.15, see pages 180–181; for 4.16 to 4.20, see pages 183–184; for 4.21 to 4.23, see pages 185–186; for 4.24, see page 187; for 4.25 and 4.26, see page 189; and for 4.27 to 4.29, see page 190.
4.18 Moving up.
An economist studying economic class mobility finds that the probability that the son of a father in the lowest economic class remains in that class is 0.46. What is the probability that the son moves to one of the higher classes?
184