+64 In some nation, license plate numbers are formed by a consonant followed by a nonzero digit followed by a vowel. How many different license plate numbers are there?
These letters are vowels in English: A, E, I, O, U, and sometimes Y. The letter Y can be a vowel (as in the words "cry", "sky", "fly" or "why"), or it can be a consonant (as in "yellow", "yacht", "yam" or "yesterday"). These five or six letters stand for about 20 vowel sounds in most English accents.
Bearing the above in mind, you have: 21 consonants, 5 vowel, 9 digits:
21 x 9 x 5 =945 number of license plates.
