PERMUTATION & COMBINATION | IIT JEE | Part 3 | JEE Main 2016 | JEE Advanced 2007 | Rank of a Word - Videos


In this video, we will learn an important concept – How to find the rank of any word in a dictionary.

Two Questions Discussed
The letters of the word COCHIN are permuted and all the permutations are arranged in an alphabetical order as in an English dictionary. The number of words that appear before the word COCHIN is
(A) 360 (B) 192 (C) 96 (D) 48
Answer (C)

JEE Main 2016
If all the words (with or without meaning) having five letters, formed using the letters of the word SMALL and arranged as in a dictionary; then the position of the word SMALL is
(A) 59th (B) 52th (C) 58th (D) 46th
Answer (C)

AIEEE 2005
If letters of the word SACHIN are arranged in all possible ways and those words are written out in the dictionary, then the word SACHIN appears at serial number
(A) 601 (B) 600 (C) 603 (D) 602
Answer (A)

If letters of the word PATANA are arranged in all possible ways as in a dictionary, then the word PATANA from the last is
(A) 20 (B) 18 (C) 19 (D) 21
Answer (C)

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  1. Sir I really appreciate your labour and hard work for us. but sir I have a small suggestion, can you make a WhatsApp group in which all of us JEE aspirants can join and discuss various studies, share notes. This would not only be beneficial for me but all others watching your video. Motive this would make social media more productive. This I think you should at least once think over it ??.
    Hoping to hear from you. ?
    Thanking you,


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