Multiple choice

A multiple choice test has 15 questions with 5 choices for each question. How many different answer keys are possible?

  1. 15! / 5!

  2. 5! / 15!

  3. (5)15

  4. (15)5

  5. 15! - 5!
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For the first question 5 answers are possible, for the second question, there also 5 answers are possible, … and so on. Therefore, the total number of possible answer keys = 5 X 5 X 5 …(fifteen times) = (5)15

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