A-LevelMathematicsProbability and statisticsMay/June 2024Paper 5 Q67 Marks
Harry has three coins: • One coin is biased so that the probability of obtaining a head when it is thrown is 1/5. • The second coin is biased so that the probability of obtaining a head when it is thrown is 1/4. • The third coin is biased so that the probability of obtaining a head when it is thrown is 1/3. Harry throws the three coins. The random variable X is the number of heads that he obtains.
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