1. Daily Homework Quiz For use after Lesson 7.8 You roll a number cube. Find the theoretical probability that you will roll: 1. a 5 2. an even number

2. Daily Homework Quiz For use after Lesson 7.8 You roll a number cube. Find the theoretical probability that you will roll: 1. a 5 2. an even number ANSWER 1 6 ANSWER 1 2

3. Simple Probability 7.8

7. EXAMPLE 3 Standardized Test Practice SOLUTION STEP 1 Find the experimental probability of a button being defective. P (defective) = 2 300

8. EXAMPLE 3 Standardized Test Practice STEP 2 300x = 40,000 300 300 x = 133 1/3 You could expect about 133 buttons in a shipment of 20,000 to be defective. The correct answer is C . ANSWER P (defective) = 2 300 = x 20,000

10. GUIDED PRACTICE for Examples 1, 2 and 3 P (rolling a number greater than 3 ) = 0.48 = 48% 16+14+18= 48 What is the experimental probability of rolling a number greater than 3 when a number cube is rolled 100 times ? What is the theoretical probability of this event? Number Cube = 48 100 Number of favorable outcomes Total number of rolls The experimental probability of rolling a number greater than 3 is 48% or 12/25 . ANSWER

11. GUIDED PRACTICE for Examples 1, 2 and 3 theoretical probability of rolling a number greater than 3: P (rolling a number greater than 3 ) Number of favorable outcomes Total number of possible outcomes = 1 2 The theoretical probability of rolling a number greater than 3 is 50% . ANSWER = 3 6