SOLUTION: How many strings of eight English lowercase letters are there a) that contain no vowels, if letters can be repeated? b) that contain no vowels, if no letters can be repeated? c)

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Question 856276: How many strings of eight English lowercase letters are there
a) that contain no vowels, if letters can be repeated?
b) that contain no vowels, if no letters can be repeated?
c) that start with a vowel, if letters can be repeated?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
a, e, i, o, u,y: IF including y as a vowel, there are 20 consonants
a) 20%2A20%2A20%2A20%2A20%2A20%2A20%2A20
b) 20%2A19%2A18%2A17%2A16%2A15%2A14%2A13
c) 6+%2A+26%5E7 Assuming vowels can be included for all 8 letters