The correct option is A 24×25×26
Number of letters in English alphabet =26
We have to find the total number of three lettered words that can be formed using the letters of English alphabet.
So, first letter can be chosen in 26 different ways by taking any one of the 26 letters.
Similarly, second letter can be chosen in 25 different ways from remaining 25 letters.
And the third one is chosen in 24 different ways.
By fundamental principle of counting,
required number of ways for choosing three letters is 26×25×24.