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A music test included 50 multiple choice questions. Zoltan’s score was calculated by

• adding 4 points for each correct answer,

• subtracting 1 point for each incorrect answer, and

• adding 0 points for each unanswered question.

Zoltan answered 45 of the 50 questions and his score was 135 points. The number of

questions that Zoltan answered incorrectly is

(A) 9 (B) 15 (C) 41 (D) 40 (E) 5

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