For a biased coin, P(H) = 2P(T). What is the probability of a head?
Correct answer C. 2/3
Explanation
Since P(H) + P(T) = 1 and P(H) = 2P(T), we have 3P(T) = 1, so P(T) = 1/3 and P(H) = 2/3.
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