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  4. A multiple choice exam has 20 questions, and each question has 5 possible answers. The same 5 answers for each question will appear on each examination paper, but they can appear in any order. The questions will appear in the same order on every examination paper. Number of different examination papers that can be printed are

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Q. A multiple choice exam has 20 questions, and each question has 5 possible answers. The same 5 answers for each question will appear on each examination paper, but they can appear in any order. The questions will appear in the same order on every examination paper. Number of different examination papers that can be printed are

Permutations and Combinations

Solution:

Correct answer is (d) $(5 !)^{20}$

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