How many words,with or without meaning,each of 3 vowels and 2 consonants,can be formed from the letters of word 'INVOLUTE'?
There are 4 vowels and 4 consonants.
total combinations of 3 vowels and 2 consonants are 4C3 X 4C2 =4X6=24.
One such combination of 3 vowels and 2 consonants can be arranged in 5!, ie., 120 ways
therefore total words =120 X 24 = 2880