EXAMPLE 4.16 Disjoint Events

Generate a random integer in the range of 10 to 59. What is the probability that the 10's digit will be odd? The event that the 10's digit is odd is the union of three disjoint events. These events are

In each of these events, there are 10 outcomes out of the 50 possible outcomes. This implies . As a result, the probability that the 10's digit is odd is