48 If probability of picking Alice is 225 say , then probability of 75 picking Bob is and Cedric . 50 Total probability is , which 24 must be 1. So . Therefore 15 Answers: 8 4 50 30 a) b) Bill is probably right, because 30000 we won’t necessarily see exactly 120 66.67 (to 2dp) Heads (since the flips are random). To 90 improve our experimental probability, 7000 we could always flip more times. 1.4 0.15 16.7 0.17 2.33 35.153846 Straight Line Graphs 0.1305882 37.333333 a) 2 b) -1 0.2090909 a) -7 b) 3 0.1818181 (0,2) a) 3 b) 9 Equations: Probability Answers: Gradient is y change divided by x change: 3 1 2 -3 a) b) c) d) -0.5 Answers: Equations:
48 225 75 50 24 15 8 4 50 30 30000 66.67 (to 2dp) 90 7000 1.4 0.15 16.7 0.17 2.33 35.153846 0.1305882 37.333333 0.2090909 0.1818181 Probability Answers: a) b) c) d) Answers: If probability of picking Alice is say , then probability of picking Bob is and Cedric . Total probability is , which must be 1. So . Therefore Answers: a) b) Bill is probably right, because we won’t necessarily see exactly 120 Heads (since the flips are random). To improve our experimental probability, we could always flip more times. Straight Line Graphs a) 2 b) -1 a) -7 b) 3 (0,2) a) 3 b) 9 Equations: Gradient is y change divided by x change: 3 1 2 -3 -0.5 Equations:
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