The maximum number of permutation of 2n letters in which there are only `a's and b's` taken all at a time is given by

The number of other permutations of the letters of the word SIMPLETON taken all at a time is:

The number of permutations of taken 4 letters from the word 'DEGREE' is

The maximum number of different permutations of 4 letters of the word EARTHQUAKE is.

The number of permutations of the letters of the word 'INDEPENDENT taken 5 at a time is

Find the number of permutations of 10 objects, taken 4 at a time.

Find the number of permutations of all the letters in ANABLAVA that does not end with A

Find the number of permutations of 7 objects, taken 3 at a time.

Number of all permutations of the set of four letters E , O , S , P taken two at a time is

The first name of a person consists of 9 letters in which one letter occurs more than once and the other letters are different.If the number of permutations of the letters of his name taken all at a time be 15120, find the number of xx the like letter occurs.