Directions: In a certain society, there are two marriage groups, red and brown. No marriage is permitted within a group. On marriage, males become part of their wives groups; women remain in their own group. Children belong to the same group as their parents. Widowers and divorced males revert to the group of their birth. Marriage to more than one person at the same time and marriage to a direct descendant are forbidden A brown female could have had I. A grandfather born Red II. A grandmother born Red III Two grandfathers born Brown

A brown female has brown parents (children belong to parents' group). Her father married her mother (brown), so he was born red and joined brown group. Her mother was born brown and remained brown. The father's father (her grandfather) was red (since father was born red, children same as parents). So a brown female CAN have a grandfather born Red - statement I is true. Her father's mother (grandmother) was born red (married into brown) - statement II is true. Can she have two grandfathers born brown? Both father's father and mother's father would need to be brown, but father's father was red - statement III is false.