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Suppose that 90% of all blond humans are murderers, while 10% of non-blond humans are murderers....

Suppose that 90% of all blond humans are murderers, while 10% of non-blond humans are murderers. If 30% of humans are blond, what is the probability that a hooded figure approaching in a dark alley is a murderer?

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TOPIC:Theorem of total probability.

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