Library Science Research Methodology Metric Studies in LIS

Which of the following is an order-unaware retrieval metrics? 

(A).Precision@kPermalink

(B). Mean Reciprocal Rank(MRR)Permalink

(C). F1@kPermalink

(D). Average Precision(AP)

1
A and B
2
B and C
3
A and C
4
B and D

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