Chapter 3 - Probability and the Binomial Distribution - Exercises 3.3.1 - 3.3.5 - Page 98: 3.3.2

Probability of an Event: P(event) = number of outcomes in event / total number of outcomes

a.) P(low income and smokes) = 634/ 6,549 = 0.0968 b.) P(not low income) = 1 - (2,480 / 6,549) = 0.621 c.) P(medium income) = 1,954 / 6,549 = 0.2984 d.) P(medium or low income) = (2,480 / 6,549) + (1,954 / 6,549) = 0.677