Mathematics, 22.08.2019 16:30, raquelqueengucci25

Suppose the alphabet consists of 14, b, c, d, e, f} (a) how many 4-letter strings do not contain the word "bed"? (b) how many 4-letter strings have "f" in the first position or "e" in the last position, but not both? (c) how many 7-letter strings contain the word "bead"? (d) how many 4-letter strings either begin with "c" or end with two vowels?

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Suppose the alphabet consists of 14, b, c, d, e, f} (a) how many 4-letter strings do not contain the...