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{"ops":[{"insert":"3. Ten married couples are in a room."},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":" a) If two people are chosen at random find the probability that "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"(i) one is male and one is female, (ii) they are married to each other. "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"b) If 4 people are chosen at random, find the probability that 2 married couples are chosen. "},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"c) If the 20 people are randomly divided into ten pairs, find the probability that each pair is a married couple."},{"insert":"\n"}]}
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