1.8

1.8 How many arrangements of six people in a row of six chairs are possible if (a) there are no restrictions on the ordering? (b) Bill and Sarah must sit together? (c) Bill and Sarah must sit apart? (d) there are three men and three women and no two people of the same gender can sit next to one another? (e) there are four men and two women and the men must sit together? (f) there are four men and two women and both the men and women must sit together? (g) there are three married couples and the couples must sit next to one another