The number of different words which can be formed by taking 4 letters at a time out of the letters of the word `'EXPRESSION'` is

The number of different permutations of letters that can be formed by taking 4 letters at a time from the letters of the word REPETITION is

How many different words can be formed by taking four letters out of the letters of the word 'AGAIN' if each word has to start with A ?

The number of 4 letter words that can be formed by using the letters of the word DEGREE is

Find the number of words which can be formed by taking two alike and two different letters from the word ' COMBINATION'

The number of 5-letter words that can be formed by using the letters of the word SARANAM is

Find the number of words which can be formed by taking two alike and two different letters from the work COMBINATION.