how many different words with or without meaning can be formed using all the letters of the word COMBINE so that
- vowels always remain together
- no two vowels are together
- vowels may occupy odd places
COMBINE HAS 7 LETTERS in which C,M,B,N R 4 CONSONANTS ND O,I,E R 3 VOWELS
1) OIE, C,M,B,N CAN BE ARRANGED 5!=120 ways
bt vowels can be arranged among themselves=3!=6 ways
total no.of ways=120*6=720