In how many can the lettes in English alphabet be arranged, so that there are 7 letters between the letters a and b.

In how many ways can the letters of the English alphabet be arranged so that there are seven letters between the letters A and B ?

How many letters of the English alphabet apperrs same whel looked in a mirror .

In how many ways all the letters of the word 'ARRANGE'can be arranged so that the 2A's are separated by exactly 2 letters

If each vowel of the word 'GRAYHOUND' is changed to the previous letter as in the English alphabetical series and each consonant is changed to the next letter as in the English alphabetical series then in new arrangement how many letters are repeated?

In how many ways the 26 English letters can be arranged along a line so that all the 5 vowels must occur always after the letter 'B'.