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Five people A, B, C, D, and E are sitting in a row facing North. A is to the immediate right of B. E is at the extreme left. D is to the immediate left of C. If B is between E and A, what is the position of D from the right end?
1st
2nd
3rd
4th
2nd
Arrange by filling fixed positions first: E is at 1, B is between E and A forces the order E-B-A, and D-C must follow to fill the row.
Arrange by filling fixed positions first: E is at 1, B is between E and A forces the order E-B-A, and D-C must follow to fill the row.
Establish fixed positions
Five people (A, B, C, D, E) face North. E is at the extreme left (Position 1). This leaves positions 2, 3, 4, and 5 open.
Apply proximity constraints
B is between E and A, so the order is E, B, A. Since E is 1, B must be 2 and A must be 3. The remaining people are D and C.
Complete the arrangement
We are told D is to the immediate left of C. In the sequence (E, B, A, _, _), the only way for D to be immediately left of C is to place D at 4 and C at 5. The final order is E, B, A, D, C.
Determine D's position
The sequence from left to right is: E(1), B(2), A(3), D(4), C(5). D is at the 4th position from the left, which corresponds to the 2nd position from the right (5-4+1 = 2).
A: 1st from right is C, not D; C: 3rd from right is A, not D; D: 4th from right is B, not D.
B is correct because the seating arrangement E-B-A-D-C places D at the 4th position from the left, making it the 2nd position from the right end.
In seating arrangement problems, always identify the 'anchors' (extreme ends or fixed spots) first to build the rest of the sequence logically.
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