Created by Mr. Lafferty Maths Dept. Probability Likelihood Line Basic Probability www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Starter Questions 55o xo 47o www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Likelihood Line Learning Intention Success Criteria We are learning how a likelihood line helps to understand probability. Understand the term likelihood line and probability. Decide where certain events should lie on the likelihood line. www.mathsrevision.com 3. Calculate simple probabilities. 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Likelihood Line 1 0.5 Impossible Evens Certain Not very likely Very likely www.mathsrevision.com Seeing a butterfly In July School Holidays Winning the Lottery Baby Born A Boy Go back in time 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Likelihood Line 1 0.5 Impossible Evens Certain Not very likely Very likely www.mathsrevision.com It will Snow in winter Homework Every week Everyone getting 100 % in test Toss a coin That land Heads Going without Food for a year. 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Now try TJ2b Ex 1 Ch18 (page 161) www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Starter Questions www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Learning Intention Success Criteria We are learning how to calculate basic probability. Understand the term probability. Calculate the probability of an event happening. www.mathsrevision.com 3. Write in fraction form. 12-May-18 Created by Mr. Lafferty Maths Dept.

Probability www.mathsrevision.com Calculating Ratio Probability One way of thinking about Probability is as a ratio Chance of an event happening is 1 in ......... www.mathsrevision.com P(Event) = the number of favourable events compared to the total number of events. 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. 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) www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Calculating Ratio Probability Example : What is the chance of getting a 4 when rolling a dice. The number of favourable events is 1 The number of total events is 6 (1,2,3,4,5,6,) www.mathsrevision.com So probability is P(4) = 1 in 6 chance 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. Probability Calculating Ratio Probability Example : What is the chance of getting an odd when rolling a dice. The number of favourable events is 3 (1,3,5) The number of total events is 6 (1,2,3,4,5,6,) www.mathsrevision.com So probability is P(odd) = 3 in 6 chance Simplify HCF = 3 P(odd) = ½ P(odd) = 1 in 2 chance 12-May-18 Created by Mr. Lafferty Maths Dept.

Created by Mr. Lafferty Maths Dept. 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. www.mathsrevision.com 12-May-18 Created by Mr. Lafferty Maths Dept.

Probability Now try TJ2b Ex 2 Ch18 (page 161) www.mathsrevision.com Have you updated your Learning Log ? Probability Now try TJ2b Ex 2 Ch18 (page 161) www.mathsrevision.com Are you on Target ? I can ? 12-May-18 Created by Mr. Lafferty Maths Dept.