• # question_answer Directions Read the following data and use it for answering the following questions that follow. Six people A, B, C, D, E and F live on a six story building each on one floor. The following statements describe where they stay. B lives on floor 6. A is equally far from C and E. F is an engineer. D is two floors above F. (5) C does not live next to an engineer. If condition 5 is invalid, how many types of arrangements are possible? A) 2                     B) 3       C) 1                                 D) 5

Ans.     If condition 5 is invalid C can live on 1st or 5th floor and E can live on 5th or 1st floor, $\therefore$ Only two types of arrangements are possible. Note $x>y$ means $x$ is living above y 6 $\to$ B 5 $\to$ C 4 $\to$ D 3 $\to$ A 2 $\to$ p 1 $\to$ E