permutation

[Punch]

Find the number of ways of selecting 3 men and 3 women from 5 married couples such that there are exactly 2 married couples.

I need the reasoning

 

[Evgeny.Makarov]

First you select two couples out of five. Then you select one man out of the remaining three and one of the two women who are not his spouse.

 

[Plato]

Find the number of ways of selecting 3 men and 3 women from 5 married couples such that there are exactly 2 married couples.
I need the reasoning

Choose three wives. From their husbands choose two. Then choose one of the other men not married to any of the three chosen wives.