Mathematics (AS & A Level) · May / June 2016 · Paper 61 · Question 2
9709
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The faces of a biased die are numbered 1, 2, 3, 4, 5 and 6. The random variable X is the score when the die is thrown. The following is the probability distribution table for X. x 1 2 3 4 5 6 PX = x p p p p 0.2 0.2 The die is thrown 3 times. Find the probability that the score is 4 on not more than 1 of the 3 throws. [5]
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