" The number of words of four letters containing equal number of vowels and consonants,where repetition is allowed,is "

The number of words of four letters containing equal number of vowels and consonants, repetition being allowed, is

The number of words of four letters consisting of equal number of vowels and consonants (of English Language) with repetition permitted is

The number of 4 letter words that can be formed using the letters of with an vowel when repetitions are allowed is

With 17 consonants and 5 vowels the number of words of four letters that can be formed having two different vowels in the middle and one consonant, repeated or different at each end is

Find number of four-digit numbers in which repetition is not allowed.

The number of five-letter words containing 3 vowels and 2 consonants that can be formed using the letters of the word 'EQUATION' so that the two consonants occur together, is

What is the number of words formed from the letters of the word 'JOKE',so that the vowels and consonants alternate?