Difficulty: Easy
Correct Answer: J
Explanation:
Introduction / Context:
Both reference letters are given by left indices. The midpoint letter is the one at the average of their positions.
Given Data / Assumptions:
Concept / Approach:
Compute M and map to the letter.
Step-by-Step Solution:
Verification / Alternative check:
Sequence from F to N has 8 steps; 4 steps from either side lands on J.
Why Other Options Are Wrong:
They sit one place to either side of the exact midpoint or outside the range.
Common Pitfalls:
Using integer division incorrectly when the sum is odd; here it is even, so midpoint is exact.
Final Answer:
J
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