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A man X has 7 friends, 4 of them are ladies and 3 are men. His wife Y also has 7 friends, 3 of them are ladies and 4 are men.Assume X and Y have no common friends.Then the total number of ways in which X and Y together can throw a party inviting 3 ladies and 3 men, so that 3 friends of each of X and Y are in this party, is :

$\begin{array}{1 1} (1) 468 \\ (2) 469 \\ (3) 484 \\ (4) 485 \end{array} $

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