These questions are based on the following information....

These questions are based on the following information. Seven girls $-\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}$ and $\mathrm{G}$ sit in a row facing north, not necessarily in the same order. It is also known that, I. Two girls sit in between $\mathrm{B}$ and $\mathrm{F}$. II. Three girls sit in between $\mathrm{C}$ and $\mathrm{G}$. III. Four girls sit in between $\mathrm{A}$ and $\mathrm{D}$. Who sits exactly at the middle of the row? (A) $\mathrm{B}$ (B) $\mathrm{D}$ (C) E (D) Cannot be determined

These questions are based on the following information. Seven girls $-\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}$ and $\mathrm{G}$ sit in a row facing
north, not necessarily in the same order. It is also known that,
I. Two girls sit in between $\mathrm{B}$ and $\mathrm{F}$.
II. Three girls sit in between $\mathrm{C}$ and $\mathrm{G}$.
III. Four girls sit in between $\mathrm{A}$ and $\mathrm{D}$.
Who sits exactly at the middle of the row?
(A) $\mathrm{B}$
(B) $\mathrm{D}$
(C) E
(D) Cannot be determined

Key Concepts

Logical Deduction

Logical deduction in constraint-based problems involves using given conditions to systematically eliminate impossible arrangements and deduce the most likely configuration. By methodically applying each constraint, one can narrow down the placement possibilities until a solution is found or determine if the available data is insufficient.

Relative Positioning

Relative positioning refers to the idea of placing objects or individuals in an arrangement based on their positions with respect to one another rather than on fixed positions. For example, knowing that two individuals must have a certain number of seats between them helps in determining their order in the overall sequence.

Linear Seating Arrangement

This concept involves arranging individuals in a row where each position is distinct and linear. It often requires numbering positions sequentially and considering the impacts of left-to-right or right-to-left ordering, especially when the individuals face a specific direction, as this influences relative positions.

Positional Constraints

Positional constraints are specific conditions or rules that restrict how objects or individuals can be placed relative to one another. In seating problems, such constraints might include fixed gaps between certain individuals or limits on the number of people that can sit between them. These constraints help narrow the number of possible arrangements.

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