The probability that a randomly selected person has high blood pressure (the event H) is P(H) = 0.4 and the probability that a randomly selected person is a runner (the event R) is P(R) = 0.5. The probability that a randomly selected person has high blood pressure and is a runner is 0.1. Find the probability that a randomly selected person has high blood pressure, given that he is a runner. a) 0.25 b) 1 c) 0 d) 0.20 e) 0.11 f) None of the above.

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