Six friends A, B, C, D, E, F sit in a row facing East. C is between A and E. B is immediately to the right of E but left of D. F is not at the right end. How many persons are to the right of E?

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