GCSE Maths Probability 5.0 / 5Teacher recommended MathematicsProbabilityGCSEAQA Created by: SunsetCreated on: 01-11-13 16:01 What forms can a probability be given in? Decimal, fraction or percentage 1 of 10 What is relative frequency? It is a probability that is found through experiment 2 of 10 What is the OR rule? P(A+B) = P(A) + P(B) 3 of 10 What are mutually exclusive events Ones which cannot happen at the same time, such as tossing a coin and getting a head and a tails 4 of 10 Two events are mutually exhaustive. What do their probabilities total? 1 5 of 10 What is the AND rule? P(A and B) = P(A) x P(B) 6 of 10 On a probability space diagram, what does each pair of branches have to equal? 1 7 of 10 The probability that you get heads when you throw a biased coin is 0.8. What is the probability that you get tails? 0.2 8 of 10 You roll a dice and throw a coin. They are not biased. What is the probability that you roll a 4 and throw tails? 1/12 (1/6 x 1/2) 9 of 10 The probability that you throw a 2 on a dice is 1/6. What is the probability that you do not throw a 2. 5/6 10 of 10

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