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June 29, 2015

Homework Help: statistics

Posted by Sandy on Saturday, February 9, 2013 at 2:22am.

A local country club has a membership of 600 and operates facilities that include an 18-hole championship golf course and 12 tennis courts. Before deciding whether to accept new members, the club president would like to know how many members regularly use each facility. A survey of the membership indicates that 70% regularly use the golf course, 50% regularly use the tennis courts, and 5% use neither of these facilities regularly.
question
A member is chosen at random from among those known to use the tennis courts regularly. What is the probability that the member also uses the golf course regularly

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