1. EXAMPLE 3 Finding Probability of Dependent Events Bingo SOLUTION You need B7 and N44 for bingo. Find the probability of success when each of the next 2 numbers is drawn. Then multiply. You are playing the bingo card shown. The caller has 50 numbers left to call. What is the probability that you will get bingo with the next 2 numbers called?

2. EXAMPLE 3 Finding Probability of Dependent Events P(B7 or N44) = 1 25 Multiply the probabilities. P (remaining number) = 1 49 There are 49 numbers left to call. P( both numbers ) = 1 25 1 49 = 1225 1 1 ANSWER The probability that you will get bingo when the next 2 numbers are called is, or about 0.0008. 1225 2 50 = There are 50 numbers left to call.

3. GUIDED PRACTICE for Example 3 4. What If? In Example 3, suppose 36 numbers are left to call. Find the probability. = 630 1 or about 0.2% P( both numbers ) = 1 18 1 35 ANSWER

4. GUIDED PRACTICE for Example 3 5. Prizes You are randomly choosing 2 business cards from a dish with 40 cards, each from a different business, to win prizes. What is the probability you choose the cards for the dry cleaners and the hair salon? 780 111 = or about 0.1% ANSWER