Statement : What an illiterate group?
Is the above statement correct or do I have to use 'a' instead of 'an' since it succeeds 'what'?
Statement : What an illiterate group?
Is the above statement correct or do I have to use 'a' instead of 'an' since it succeeds 'what'?
The usage of a/an depends on the sound of the first letter of the word it precedes. In your case, the word after the 'a(n)' particle begins with a vowel sound, therefore 'an' is the correct particle to use. If it were a consonant sound, 'a' would be used instead.
Examples: