Mathematics (AS & A Level) · May / June 2024 · Paper 51 · Question 6
9709
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The question as text
Harry has three coins: • One coin is biased so that the probability of obtaining a head when it is thrown is 3 1. • The second coin is biased so that the probability of obtaining a head when it is thrown is 4 1. • The third coin is biased so that the probability of obtaining a head when it is thrown is 5 1. Harry throws the three coins. The random variable X is the number of heads that he obtains.
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6(a)[4]
6(b)[3]
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