34.2 Here is a four-sided spinner. The sides of the spinner are labelled A, B, C and D. The table shows the probability that the spinner will land on A or on B or on D. Letter A B C D Probability 0.12 0.39 0.18 Amber spins the spinner once. (a) Work out the probability that the spinner will land on C. (2) Lucy is going to spin the spinner 50 times. (b) Work out an estimate for the number of times the spinner will land on A. (2) November 2012 Unit 1 (Modular) Higher Calculator Q2 – – – – 34.3 Denzil has a 4-sided spinner. The sides of the spinner are numbered 1, 2, 3 and 4 The spinner is biased. The table shows each of the probabilities that the spinner will land on 1, on 3 and on 4 The probability that the spinner will land on 3 is x. Number 1 2 3 4 Probability 0.3 0.1 x (a) Find an expression, in terms of for the probability that the spinner will land on 2. x, Give your answer in its simplest form. (2) Denzil spins the spinner 300 times. (b) Write down an expression, in terms of for the number of times the spinner is likely to x, land on 3. (1) June 2011 Unit 1 (Modular) Higher Calculator Q5 – – – – 34.4 The probability that a pea plant will grow from a seed is 93%. Sarah plants 800 seeds. Work out an estimate for the number of seeds that will grow into pea plants. (Total for Question 2 is 2 marks) March 2013 Unit 1 (Modular) Higher Calculator Q2 – – – –
34.2 Here is a four-sided spinner. The sides of the spinner are labelled A, B, C and D. The table shows the probability that the spinner will land on A or on B or on D. Letter A B C D Probability 0.12 0.39 0.18 Amber spins the spinner once. (a) Work out the probability that the spinner will land on C. (2) Lucy is going to spin the spinner 50 times. (b) Work out an estimate for the number of times the spinner will land on A. (2) November 2012 – Unit 1 (Modular) – Higher – Calculator – Q2 34.3 Denzil has a 4-sided spinner. The sides of the spinner are numbered 1, 2, 3 and 4 The spinner is biased. The table shows each of the probabilities that the spinner will land on 1, on 3 and on 4 The probability that the spinner will land on 3 is x. Number 1 2 3 4 Probability 0.3 x 0.1 (a) Find an expression, in terms of x, for the probability that the spinner will land on 2. Give your answer in its simplest form. (2) Denzil spins the spinner 300 times. (b) Write down an expression, in terms of x, for the number of times the spinner is likely to land on 3. (1) June 2011 – Unit 1 (Modular) – Higher – Calculator – Q5 34.4 The probability that a pea plant will grow from a seed is 93%. Sarah plants 800 seeds. Work out an estimate for the number of seeds that will grow into pea plants. (Total for Question 2 is 2 marks) March 2013 – Unit 1 (Modular) – Higher – Calculator – Q2
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