1. Express as a fraction the probability that the outcome for rolling two number cubes has a sum less than 7. Probability COURSE 3 LESSON 6-9 Make a table to find the sample space for rolling two number cubes. 123456 1(1,1)(2,1)(3,1)(4,1)(5,1)(6,1) 2(1,2)(2,2)(3,2)(4,2)(5,2)(6,2) 3(1,3)(2,3)(3,3)(4,3)(5,3)(6,3) 4(1,4)(2,4)(3,4)(4,4)(5,4)(6,4) 5(1,5)(2,5)(3,5)(4,5)(5,5)(6,5) 6(1,6)(2,6)(3,6)(4,6)(5,6)(6,6) 6-9 123456 1(1,1)(2,1)(3,1)(4,1)(5,1)(6,1) 2(1,2)(2,2)(3,2)(4,2)(5,2)(6,2) 3(1,3)(2,3)(3,3)(4,3)(5,3)(6,3) 4(1,4)(2,4)(3,4)(4,4)(5,4)(6,4) 5(1,5)(2,5)(3,5)(4,5)(5,5)(6,5) 6(1,6)(2,6)(3,6)(4,6)(5,6)(6,6) Out of the 36 possible outcomes, the 15 outcomes shown in red have a sum less than 7. So, P(sum less than 7) =, or. 15 36 5 12

2. What is the probability (as a fraction) of there being at least 1 male kitten in a litter of 4 kittens? Express the probability as a fraction. Probability COURSE 3 LESSON 6-9 6-9

3. (continued) Probability COURSE 3 LESSON 6-9 P(at least one male) = number of outcomes with at least one male kitten total number of possible outcomes with four kittens 15 16 =Substitute. 6-9

4. Probability 1.A 6-sided number cube has the numbers 1, 2, 3, 4, 5, and 6 on its faces. What is the probability of rolling a number less than 5? Write your answer as a fraction and as a percent. 2.Find the sample space for tossing two coins. Then find P(0 heads). COURSE 3 LESSON 6-9 HH, HT, TH, TT; 25% ; 66 % 2323 2323 6-9