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How many three letter words are formed using the letters of the word TIME?

How many three letter words are formed using the letters of the word TIME?
A. 12
B. 20
C. 16
D. 24
E. 30

Answer: Option D
Explanation:
The number of letters in the given word is four. 
The number of three letter words that can be formed using these four letters is ⁴P₃ = 4 * 3 * 2 = 24.
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