INTERMEDIATE : Not talking about Level. Part-IV

Ways to arrange all vowels = $\frac{6!}{2!3!}=60$ Ways to arrange all consonants = $\frac{6!}{2!}=360$

Since all consonants must be placed together, we have 7 ways to do that, i.e starting from 1st, 2nd,...7th place.

Words can be made = $60\times360\times7=151200$

keeping 6 consonants together(let call them <C>),we have 7 letters(6 are vowels).They can b arranged in 7!/(3!2!) ways...the 6 consonants can be arranged in 6!/2! ways...hence total no. of comb= (7!/(3!2!))X(6!/2!) =151200