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a) How many four-letter words can be formed from the letters of the word TAUDRY if...

a) How many four-letter words can be formed from the letters of the word TAUDRY if each letter can only be used one time in a word? Y is NOT considered a vowel in this word.

b) How many contain all the vowels?

c) How many contain exactly three consonants?

d) How many of them begin and end in a consonant?

e) How many contain both D and Y?

Math   Statistics-And-Probability   
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