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Dear Student!
Number of Men = 7
Number of Women = 7
Number of ways to arrange 2 men out 7 men = 7P2
Since, no husband and wife play in the same set, then number of ways to arrange 2 women out of 5 women (Wives of the two men can not play with same game) in 5P2 ways.
Hence, by fundamental principle if multiplication,
Total number of game played = 7P2 × 5P2
= 840
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