Mathematics (AS & A Level) · May / June 2020 · Paper 53 · Question 5
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As printed in the paper
The question as text
A pair of fair coins is thrown repeatedly until a pair of tails is obtained. The random variable X denotes the number of throws required to obtain a pair of tails.
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Show the answer and mark scheme
5(a)[1]
5(b)[1]
5(c)[2]
5(d)[5]
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