Question

How many different four letter words can be formed (the words need not be meaningful)


using the letters of the word 'mediterranean' such that the first letter is e and the


last letter is r?

Answer 1

here there are total 13 alphabets but given that first letter is e and last is r so now we have to arrange 11 alphabet ways to arrange them is
11!/2!2!2!
( divided it by 2!2!2! because e,a,n repeated twice)