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Probability of Random Letter Selection

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Many newspapers carry a certain puzzle in which the individual must unscramble letters to form words.

How many ways can the letters of YARNLE be arranged?

What is the probability of coming up with the correct unscrambling through random letter selection?

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The solution gives detailed explanations on counting the ways that letters of YARNLE can be arranged.

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How many ways can the letters of YARNLE be arranged?

Answer: since there are one Y, one A, one R, one N, one L and ...

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