Question: A band estimated that when a random ticket holder is invited on stage, there is a 1/7 chance that the person will be over 30

A band estimated that when a random ticket holder is invited on stage, there is a 1/7 chance that the person will be over 30 years old. The band also estimates that two-fifths of its fans of any given adult age are women. If they band invites a random ticket holder onstage, what is the probability that this person is a woman over 30 years old?

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