Measures how high the first relevant result appears in retrieval lists. Standard for QA and search evaluation.
MRR = (1/|Q|) × Σ (1 / rank_i)Where rank_i = position of first relevant result for query i.
first_relevant_ranks = [1, 2, 4] MRR = (1/1 + 1/2 + 1/4) / 3 = 1.75/3 → 0.58333
Round to **5 decimal places**.
Similar Problems
Test Cases (2 visible · 2 hidden)
Case 1: Standard MRR
Input: mrr([1,2,4])
Expected: 0.58333
Case 2: Always rank 1
Input: mrr([1,1,1])
Expected: 1.0
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