Find the number of 4 letter words, with or without meaning, which can be formed out of the letters of the word MAKE, where the repetition of the letters is not allowed.

Explanation

There are as many words as there are ways of illing in 4 vacant places by the 4 letters, keeping in mind that the repetition is not allowed. The first place can be filled in 4 different ways by anyone of the 4 letters M, A, K, E.
Following which, the second place can be filled in by anyone of the remaining 3 letters in 3 different ways, following which the third place can be filled in 2 different ways: following which , the fourth place can be filled in 1 way.
Thus, the number of ways in which the 4 places can be filled, by the multiplication principle, is `4xx3xx2xx1=24`.
Hence, the required number of words is 24.