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English has  letters that can be vowels. This includes Y, which can be either a consonant or a vowel; for this problem, we'll consider Y a consonant.  The other  English letters always consonants. How many two-letter "words" can we make from these letters if we are required to use at least one vowel?

 Aug 18, 2021
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Question was answered here https://web2.0calc.com/questions/help_80385

 Aug 18, 2021
edited by Guest  Aug 18, 2021

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