Question

How many 4-letter words with at least one vowel can be constructed from the

letters A, B, C, D, and E? (Note that A and E are vowels.)

Answer 1

544

Explanation:

How many 4 letter words can be constructed from ABCDE that would be 5^4 = 625

How many 4 letter words can be constructed using BCD that would be 3^4 = 81

So the number of words that use at least one vowel would be 5^4 - 3^4 = 625-81 = 544

Answer 2

Answer: that would be 5^4 = 625

Explanation: