Difficulty: Easy
Correct Answer: 2
Explanation:
Introduction / Context:
Using the same constraints as the previous item, we must count how many seats lie to the right of E in a valid arrangement.
Given Data / Assumptions:
The constraints are identical to the previous problem: C between A and E; E–B adjacency with B left of D; F not at the right end.
Concept / Approach:
Construct a consistent row and then simply count positions to the right of E.
Step-by-Step Solution:
One valid order is: A, F, C, E, B, D (left→right).To the right of E (position 4) are positions 5 and 6 ⇒ exactly 2 persons.
Verification / Alternative check:
Any valid arrangement respecting the constraints keeps B and D to the right of E, giving 2 persons.
Why Other Options Are Wrong:
They miscount or imply E is too far right/left, violating adjacency constraints.
Common Pitfalls:
Placing F at the extreme right, which is explicitly forbidden.
Final Answer:
2
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