WBCS.LIVE practice question

A clerk is given 3 letters written in a language unknown to her. She is also given an envelope with address corresponding to each letter written in same language. If the clerk has to put the letters in the envelopes, in how many ways she can do it so that none of the 3 envelopes has the letter with the correct address in it?

Solve this multiple-choice question and check the correct answer with its explanation below.