In the following diagram, three classes of populations are represented by three figures. The triangle represents the school teachers, the square represents the married persons and the circle represents the persons living in joint families.School teachers who are neither married nor do live in joint families are represented by(A) F (B) C (C) B (D) A

In the following diagram, three classes of populations are represented

1.	In the following diagram, three classes of populations are represented by three figures. The triangle represents the school teachers, the square represents the married persons and the circle represents the persons living in joint families.School teachers who are neither married nor do live in joint families are represented by(A) F (B) C (C) B (D) A
Answer» (A) School teacher are represented by the triangle. But according to the given conditions, persons are neither married nor do they live in joint families. So, the regions should to be a part of either the square or the circle. Such a region is F.