Solve the problem. 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 63% regularly use the golf course, 50% regularly use the tennis courts, and 10% use neither of these facilities regularly. What is the probability that a member regularly uses at least one of the golf or tennis facilities? a) 0.23 b) 0.90 c) 0.10 d) 0.50