There are three families each with two sons and two daughters. In how many ways can these young people be married so that each couple includes one member of each gender, no couple is brother and sister, and there are no singles left over?
1st family boy = 2nd family girl
2nd family boy = 3rd family girl
3rd family boy = 1st family girl
3rd family boy = 2nd family girl
2nd family boy = 1st family girl
1st family boy = 3rd family girl
hope this is the answer:)
family answer
