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ALGEBRA

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A history teacher gives a 20 question T-F exam. In how many different ways can the test be answered if the possible answers are T or F, or possibly to leave the answer blank?

  • ALGEBRA -

    I THINK 60 (not sure)

  • ALGEBRA -

    2 choices for each answer gives 2^20 = 1,048,576

    including blanks, that's 3 choices for each question, or 3^20 = 3,486,784,401

  • ALGEBRA -

    100

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