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(Choose 1 answer)
You are evaluating a binary classifier. There are 80 positive outcomes in the test data, and 150 observations.Using a 50% threshold, the classifier predicts 60 positive outcomes, of which 20 are incorrect.
What is the classifier's F1 score on the test sample?
Α. 75%
B. 57.2%
C. 67.5%
D. 42.8%


1