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A quiz contains 13 questions. There are four possible answers for each question. a. In how many ways can a student answer the questions on

A quiz contains 13 questions. There are four possible answers for each question.

a. In how many ways can a student answer the questions on the test if the student answers every question? 

b. In how many ways can a student answer the questions on the test if the student can leave answers blank?

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