Question

How many words are formed from the word ERUPTION, which start from consonants and finish with consonants?

Q: Answer-How many words are formed from the word ERUPTION, which start from consonants and finish with conson...

There are total 8 letters in the given word out of which 4 are consonants R, P, T, N and 4 are vowels E, U, I, O we have to form a word of 8 letters which have first and last letter consonants. In the beginning and in the last we put 2 consonants out of 3 by 4P2 12 methods. Now, in between first and last letters 6 letters may be put in 6P6 6 Therefore, number of words comprises consonant in first and in last will be 6 12 720 12 8640