Probability www mathsrevision com Level 2 Likelihood Line

Probability www. mathsrevision. com Level 2 Likelihood Line Basic Probability 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com Level 2 55 02 -Nov-20 o 47 o x o Created by Mr. Lafferty Maths Dept.

Probability Likelihood Line www. mathsrevision. com Level 2 Learning Intention Success Criteria 1. We are learning how a likelihood line helps to understand probability. 1. Understand the term likelihood line and probability. 2. Decide where certain events should lie on the likelihood line. 3. Calculate simple probabilities. 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Probability Likelihood Line www. mathsrevision. com Level 2 0 Impossible Seeing a butterfly In July 02 -Nov-20 0. 5 Not very likely School Holidays Evens Winning the Lottery Created by Mr. Lafferty Maths Dept. 1 Very likely Baby Born A Boy Certain Go back in time

Probability Likelihood Line www. mathsrevision. com Level 2 0 Impossible It will Snow in winter 02 -Nov-20 0. 5 Not very likely Evens Homework Everyone getting Every week 100 % in test Created by Mr. Lafferty Maths Dept. 1 Very likely Certain Toss a coin Going without That land Food Heads for a year.

Probability www. mathsrevision. com Level 2 Now try TJ 2 b Ex 1 Ch 18 (page 161) 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com Level 2 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Probability www. mathsrevision. com Level 2 Learning Intention Success Criteria 1. We are learning how to calculate basic probability. 1. Understand the term probability. 2. Calculate the probability of an event happening. 3. Write in fraction form. 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Probability Calculating Ratio Probability Level 2 www. mathsrevision. com One way of thinking about Probability is as a ratio Chance of an event happening is 1 in. . P(Event) = the number of favourable events compared to the total number of event 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Probability Calculating Probability Level 2 www. mathsrevision. com 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) 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Probability Calculating Ratio Probability Level 2 www. mathsrevision. com 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 So probability is P(4) = 1 in 6 chance 02 -Nov-20 Created by Mr. Lafferty Maths Dept. (1, 2, 3, 4, 5, 6, )

Probability Calculating Ratio Probability Level 2 www. mathsrevision. com Example : What is the chance of getting an odd when rolling a dice. The number of favourable events is 3 The number of total events is 6 (1, 3, 5) (1, 2, 3, 4, 5, 6, ) So probability is Simplify HCF = 3 02 -Nov-20 P(odd) = 3 in 6 chance P(odd) = 1 in 2 chance Created by Mr. Lafferty Maths Dept. P(odd) = ½

Probability Calculating Probability www. mathsrevision. com Level 2 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. 02 -Nov-20 Created by Mr. Lafferty Maths Dept.

Have you updated your Learning Log ? Probability www. mathsrevision. com Level 2 Now try TJ 2 b Ex 2 Ch 18 (page 161) Are you on Target ? I can ? 02 -Nov-20 Created by Mr. Lafferty Maths Dept.