35. Martin and Mary have free earlobes, but their son Mark does not. If Martin and Mary have two mor
問題詳情
35. Martin and Mary have free earlobes, but their son Mark does not. If Martin and Mary have two more children, what is theprobability that both will have attached earlobes? (A) 1/4 (B) 3/4 (C) 1/16 (D) 9/16 (E) 3/16