1. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Probability www.mathsrevision.com Revision of Probability Probability from Tables

2. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com 55 o xoxo 47 o

3. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.Understand the term probability. probability. 1.We are revising how to calculate probability. 2.Calculate the probability of an event happening. www.mathsrevision.com Probability 3.Write in Simplest form.

4. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com 10.50 CertainEvensImpossible Not very likely Very likely Everyone getting 100 % in test Homework Every week Toss a coin That land Heads It will Snow in winter Going without Food for a year. Probability Likelihood Line Which event is fair? Tossing a coin

5. N5 Num 25-Feb-16Created by Mr Lafferty Maths Dept Probability Likelihood Line www.mathsrevision.com 10.50 CertainEvensImpossible Not very likely Very likely Winning the Lottery School Holidays Baby Born A Boy Seeing a butterfly In July Go back in time

6. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Probability Calculating Probability Probability can be thought of as a simple fraction or decimal. It always lies between 0 and 1. 0 meaning impossible ( could not happen) 1 meaning certain ( will definitely happen)

7. N5 Num 25-Feb-16Created by Mr Lafferty Maths Dept Probability Number Likelihood Line www.mathsrevision.com 10.50 CertainEvensImpossible 12354 7 68 0.10.20.30.40.60.70.80.9 Q. What is the chance of picking a number between 1 – 8 ? Q. What is the chance of picking a number that is even ? Q. What is the chance of picking the number 1 ? 8 8 = 1 4 8 = 0.5 1 8 = 0.125 P = P(E) = P(1) =

8. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. www.mathsrevision.com Probability Calculating Probability Example : A boy tossed a coin. What is the probability that it is heads. Example : There are 3 red and 4 green balls in a bag. What is the probability a green ball is picked.

15. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Now try N5 Lifeskills Revision Ex Ch8 (page 96) www.mathsrevision.com Probability

16. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com 55 o xoxo 47 o

17. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Learning Intention Success Criteria 1.We are learning how to calculate probability from tables. 1. Calculate the probability of an event happening. from a given table. www.mathsrevision.com Probability 2. Write in Simplest form.

18. P(Pink) = 3 25 P(Blue) = 7 24

19. 25-Feb-16Created by Mr. Lafferty Maths Dept. P(new) = 40 120 = 1 3 P(aged 18 to 40 and new) = 17 120

20. 25-Feb-16Created by Mr. Lafferty Maths Dept. P(new) = 310 600 (a)(b) = 31 60 P(>2000 and 3+) = 10 600 = 1 60 60 → 1 4200 → = 4200 60 x 1 = 70

21. N5 Num 25-Feb-16Created by Mr. Lafferty Maths Dept. Now try N5 Lifeskills Revision Ex 1 Ch8 (page 97) www.mathsrevision.com Probability Have you updated your Learning Log ? Are you on Target ? I can ?