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yeh the answers are correct however (8C4 / 2) * 3 * 3 = 315 which is the right answer (probably typed it in the calculator wrong?) thank you soooooo very much

29a) how many doubles tennis games are possible, given a group of four players? b) In how many ways can two games of doubles tennis be arranged, given a group of eight players c) six married couples are to play in a three games of double tennis. Find how many ways the pairings can be arranged...