20.3 Martin and Luke are students in the same maths class. The probability that Martin will bring a calculator to a lesson is 0.8 The probability that Luke will bring a calculator to a lesson is 0.6 (a) Complete the probability tree diagram. (2) (b) Work out the probability that both Martin and Luke will not bring a calculator to alesson. (2) March 2011 Unit 1 (Modular) Higher Calculator Q11 – – – – In a the probability that any customer buys a newspaper is 0.6 20.4. newsagent’s shop, In the same shop, the probability that any customer buys a magazine is 0.3 (a) Complete the probability tree diagram. (2) (b) Work out the probability that a customer will buy either a newspaper or a magazinebut not both. (3) March 2012 Unit 1 (Modular)–Higher Calculator Q9 – – – Sally has a fair 4-sided spinner numbered 1, 3, 5 and 7 20.5 and a fair 6-sided die. 1 6 7 3 5 35 He spins the spinner once and rolls the die once. To get the score he adds the numbers together. (a) Work out the probability that the score will be 3 (2) (b) Work out the probability the score will be less than 5. (3) Practice Paper Set B Unit 1 (Modular)–Higher Calculator Q13 – – –
20.3 Martin and Luke are students in the same maths class. The probability that Martin will bring a calculator to a lesson is 0.8 The probability that Luke will bring a calculator to a lesson is 0.6 (a) Complete the probability tree diagram. (2) (b) Work out the probability that both Martin and Luke will not bring a calculator to alesson. (2) March 2011 – Unit 1 (Modular) – Higher – Calculator – Q11 20.4. In a newsagent’s shop, the probability that any customer buys a newspaper is 0.6 In the same shop, the probability that any customer buys a magazine is 0.3 (a) Complete the probability tree diagram. (2) (b) Work out the probability that a customer will buy either a newspaper or a magazinebut not both. (3) March 2012 – Unit 1 (Modular)–Higher – Calculator – Q9 20.5 Sally has a fair 4-sided spinner numbered 1, 3, 5 and 7 and a fair 6-sided die. 1 6 7 3 5 35 He spins the spinner once and rolls the die once. To get the score he adds the numbers together. (a) Work out the probability that the score will be 3 (2) (b) Work out the probability the score will be less than 5. (3) Practice Paper Set B – Unit 1 (Modular)–Higher – Calculator – Q13
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