'The English alphabet contains 21 consonants and five vowels. How many strings of six lowercase letters of the English alphabet contain exactly one vowel? C(6,1)*52*21 5*C(6,1)*21 C C(6,2)*52*21= D. 6*C(6,1)*215 E. 6*C(6,2)* 52*21'
Added by Paula F.
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There are 6 positions, so we have C(6,1) ways to choose the position of the vowel. Show more…
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