Mathematics (AS & A Level) · May / June 2017 · Paper 62 · Question 4
9709
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Two identical biased triangular spinners with sides marked 1, 2 and 3 are spun. For each spinner, the probabilities of landing on the sides marked 1, 2 and 3 are p, q and r respectively. The score is the sum of the numbers on the sides on which the spinners land. You are given that Pscore is 6 = 1 36 and Pscore is 5 = 1 9. Find the values of p, q and r. [6]
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