A company decides to label each of its different products with a code that consists of two letters followed by three digits. How many different products can be labelled in this way?

In how many different ways can 8 friends sit around a table?

How many different words are formed if the letters R is used thrice and letters S and T are used twice each?

Determine the number of different words that can be formed with each of three letters of the word ENGLISH, if each letter is to be used not more than once.

How many words can be formed by writing letters in the word CROWN in different order?

A question paper has two sections. section I has 5 questions and section II has 6 questions. A student must answer at least two question from each among 6 questions he answers. How many different coices does the student have in choosing question?

How many different ways are there to arrange letters of the word 'WORLD'? How many of these arrangements begin with the letter R?