26. (5%) In a statistics exam, all problems are multiple-choice with 5 possible items
(5選項之單選題),e.g.,( A )( B )( C )( D )( E ). Emily knew the answers to 60% of the
problems, and randomly guessed the answers for the rest of the problems. What is
the percentage of her score gained from guessing?
(A)8%
(B) 12%
(C)16%
(D) 20%
(E) unable to evaluate
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