What is the probability that if 15 letters are typed no letters are repeated Round your answer to 6 decimal places as needed?

When an event is repeated, the probability of it occurring is squared. For instance, if an outcome had the probability of 1/4, then the outcome happening twice would have a probability of 1/16. Note, however, that this does not mean that the second event has different probabilities. That particular outcome will always be 1/4, regardless of anything that happened before it.

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What is the probability that if 6 letters are typed, no letters are repeated? The probability that no letters are repeated is:

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Look at the total possible 14 letter words.