A small city in Vermont has 11 men and 7 women.

a) What is the maximum number of civil unions (that is, man-man, woman-woman, man-woman) that can be formed from this group

b) how many different ways can this maximum number of civil unions be formed?

for problem a) i figured it out: 11+7 = 18, 18/2 = 9 which is the maximum number of civil unions that can be formed from this group.

problem b) is confusing so i need your help please..