A man has 7 relatives, 4 women and 3 men. His wife also has 7 relatives, 3 women and 4 men. The number of ways in which they can invite 3 men and 3 women so that they both invite three each is
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A man has 7 relatives, 4 women and 3 men. His wife also has 7 relatives, 3 women and 4 men. The number of ways in which they can invite 3 men and 3 women so that they both invite three each is