Five letter words formed from perfume

(i):find the number of four letter words that can be formed from the letter history (ii):how many o...

4 -letter "words" are formed using the letters A, B, C, D, E, F, G. How many such words are possible...

5-letter “words” are formed using the letters A, B, C, D, E, F, G. Find the number of possible words...