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L1 Probability Starters Links Probability Starter 1Probability Starter 1 Probability Starter 1 SolnsProbability Starter 1 Solns Probability Starter 2Probability Starter 2 Probability Starter 2 SolnsProbability Starter 2 Solns Probability Starter 3Probability Starter 3 Probability Starter 3 SolnsProbability Starter 3 Solns Probability Starter 4Probability Starter 4 Probability Starter 4 SolnsProbability Starter 4 Solns Probability Starter 5Probability Starter 5 Probability Starter 5 SolnsProbability Starter 5 Solns Probability Starter 6Probability Starter 6 Probability Starter 6 SolnsProbability Starter 6 Solns Probability Starter 7Probability Starter 7 Probability Starter 7 SolnsProbability Starter 7 Solns Probability Starter 8Probability Starter 8 Probability Starter 8 solnsProbability Starter 8 solns Probability Starter 9Probability Starter 9 Probability Starter 9 solnsProbability Starter 9 solns Probability Starter 10Probability Starter 10 Probability Starter 10 solnsProbability Starter 10 solns A B C

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1 st slide 1) 2) 5) 3) 4) Find the probability of being a Boy BoysGirlsTotals Cat12820 Dog161430 282250 Favourite pets Find the probability of a Dog being favourite pet Find the probability that a Boy has a Cat as favourite pet Find the probability of being a girl, given that a dog is a favourite pet Find the probability of being a Boy and having a Cat as favourite pet Probability Starter 1

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Probability Starter 1 Solns 1) 2) 5) 3) 4) Find the probability of being a Boy BoysGirlsTotals Cat12820 Dog161430 282250 Favourite pets Find the probability of a Dog being favourite pet Find the probability that a Boy has a Cat as favourite pet Find the probability of being a girl, given that a dog is a favourite pet Find the probability of being a Boy and having a Cat as favourite pet 1 st slide

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Probability Starter 2 1) 2) 5) 3) 4) Find the probability getting ‘A’ on both spins A simple lottery wheels is spun twice Find the probability spinning a ‘B’ or a ‘C’ Find the probability of the two spins being in alphabetical order Find the probability of spelling CAB in 3 spins Find the probability of spinning a pair the same A B C 1 st slide

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Probability Starter 2 Solns 1) 2) 5) 3) 4) Find the probability getting ‘A’ on both spins A simple lottery wheels is spun twice Find the probability spinning a ‘B’ or a ‘C’ Find the probability of the two spins being in alphabetical order Find the probability of spelling CAB in 3 spins Find the probability of spinning a pair the same A B C 1 st slide

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Probability Starter 3 1) 2) 5) 3) 4) Find the probability getting a ‘star’ card first A shop runs a promotion with one of 5 cards given with each purchase (there are a very large number of cards) Find the probability of getting a yellow card first If you select a blue card, what's the chance it is a moon? Find the probability of getting a blue card first, then a red card Find the probability of getting two stars in a row 1 st slide

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Probability Starter 3 Solns 1) 2) 5) 3) 4) Find the probability getting a ‘star’ card first A shop runs a promotion with one of 5 cards given with each purchase (there are a very large number of cards) Find the probability of getting a yellow card first If you select a blue card, what's the chance it is a moon? Find the probability of getting a blue card first, then a red card Find the probability of getting two stars in a row 1 st slide

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Probability Starter 4 1) 2) 5) 3) 4) Find the probability getting a red card first Two cards are selected at random from this hand Find the probability of getting an Ace or Queen first If you select a Queen first, what's the chance of getting a Queen 2nd Find the probability of getting a 4 first, then a 6 next Find the probability of getting two Queens 1 st slide

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Probability Starter 4 Solns 1) 2) 5) 3) 4) Find the probability getting a red card first Two cards are selected at random from this hand Find the probability of getting an Ace or Queen first If you select a Queen first, what's the chance of getting a Queen 2nd Find the probability of getting a 4 first, then a 6 next Find the probability of getting two Queens 1 st slide

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Probability Starter 5 1) 2) 5) 3) 4) Find the probability of Bill getting a 4 OR 5 Bill rolls a dice Find the probability of Bill getting a 5 and Ted getting a 1 Find the probability of Bill & Ted getting the same result Find the probability of Ted rolling a score greater than Bills roll Ted rolls a dice Find the probability of Ted rolling twice Bills roll 1 st slide

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Probability Starter 5 Solns 1) 2) 5) 3) 4) Find the probability of Bill getting a 4 OR 5 Bill rolls a dice Find the probability of Bill getting a 5 and Ted getting a 1 Find the probability of Bill & Ted getting the same result Find the probability of Ted rolling a score greater than Bills roll Ted rolls a dice Find the probability of Ted rolling twice Bills roll 1 st slide

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Probability Starter 6 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of MTB crash and being late Find the probability of being late Find the probability of being late IF there was no crash Given that I crash my MTB find the probability of being on time MTB crash No crash Late On time Late On time 0.15 0.8 0.05 1 st slide

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Probability Starter 6 Solns 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of MTB crash and being late Find the probability of being late Find the probability of being late IF there was no crash Given that I crash my MTB find the probability of being on time MTB crash No crash Late On time Late On time 0.15 0.8 0.05 0.95 0.2 0.85 1 st slide

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Probability Starter 7 1) 2) 5) 3) 4) Find the probability of the first spin being a 4 Find the probability of the two spins being the same number Find the probability of the two spins adding to 8 Find the probability the first spin being greater than the 2nd 2 54 3 A numbered lottery spinner is spun twice Find the probability of the two spins adding to 7 1 st slide

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Probability Starter 7 Solns 1) 2) 5) 3) 4) Find the probability of the first spin being a 4 Find the probability of the two spins adding to 8 Find the probability the first spin being greater than the 2nd 2 54 3 A numbered lottery spinner is spun twice Find the probability of the two spins adding to 7 Find the probability of the two spins being the same number 1 st slide

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Probability Starter 8 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of doing no study & passing the test Find the probability of passing the test 35% of people who study & pass the test get ‘merit’ What is the chance of this happening? What is the chance of passing and not getting a ‘merit’ given that a student did study for the test. Study No study Passed No Pass Passed No Pass 0.7 0.8 70% of students study for a test. 80% of those who did study passed the test, but only 45% of those who no study passed the test 1 st slide

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Probability Starter 8 solns 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of doing no study & passing the test Find the probability of passing the test 35% of people who study & pass the test get ‘merit’ What is the chance of this happening? What is the chance of passing and not getting a ‘merit’ given that a student did study for the test. Study No study Passed No Pass Passed No Pass 0.7 0.8 0.45 70% of students study for a test. 80% of those who did study passed the test, but only 45% of those who no study passed the test 0.55 0.2 0.3 1 st slide

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Probability Starter 9 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of a duck being shot at & living Find the probability of a duck living 70% of ducks who die when shot at are found by the hunter. What is the chance of this happening? If a duck was shot at, what is the chance of a duck not being found by the hunter? Shot at Not shot at Die Live Die Live 0.1 0.04 10% of ducks get shot at during the duck shooting season – Of these 80% are killed. 4% of ducks not shot at, die of fright. 1 st slide

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Probability Starter 9 solns 1) 2) 5) 3) 4) Copy & complete the probability tree Find the probability of a duck being shot at & living Find the probability of a duck living 70% of ducks who die when shot at are found by the hunter. What is the chance of this happening? If a duck was shot at, what is the chance of a duck not being found by the hunter? Shot at Not shot at Die Live Die Live 0.1 0.8 0.04 10% of ducks get shot at during the duck shooting season – Of these 80% are killed. 4% of ducks not shot at, die of fright. 0.96 0.2 0.9 1 st slide

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Probability Starter 10 Design a simulation to find the chance of an injury on a rainy day Tool: Trial: Record: There is a 20% chance of a car crash on a rainy day. 45% of these crashes involve injury to the people in the car Calculate: 1 st slide

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Probability Starter 10 solns Design a simulation to find the chance of an injury on a rainy day Tool: Trial: Record: There is a 20% chance of a car crash on a rainy day. 45% of these crashes involve injury to the people in the car Calculate: 1 st slide

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