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How many words (with or without meaning)...

How many words (with or without meaning) of three distinct letters of the English alphabets are there?

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There are 26 letters in the English alphabet, so for words with three distinct letters, the first place has 26 choices of letters, the next has remaining 25 choices and the third place has 24 choices.
`therefore` Total number of words =` 26 × 25 × 24 = 15600`
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