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Permutations and Combinations question

2017 · 8 Apr · Shift 1 · Q26
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Permutations and Combinations question

2017 · 8 Apr · Shift 1 · Q26

JEE MainMathematicsPermutations and CombinationsMCQ+4 / −1
If all the words, with or without meaning, are written using the letters of the word QUEEN and are arranged as in English dictionary, then the position of the word QUEEN is :
  1. A
    44th
  2. B
    45th
  3. C
    46th
  4. D
    47th
View written solutionFree

Correct answer: C

  1. Letters in the word

The word is QUEEN.

Its letters are: Q,U,E,E,NQ, U, E, E, NQ,U,E,E,N

There are 555 letters, with EEE repeated twice.

In dictionary order, we arrange the distinct letters alphabetically: E<N<Q<UE < N < Q < UE<N<Q<U

We need to find how many distinct arrangements come before the word QUEEN.


  1. Count words before QUEEN by fixing letters one by one

We use the standard lexicographic ranking method.


Step 1: First letter of QUEEN is Q

Available letters: E,E,N,Q,UE,E,N,Q,UE,E,N,Q,U

Letters smaller than QQQ are EEE and NNN.

Case 1: First letter is EEE

Remaining letters: E,N,Q,UE,N,Q,UE,N,Q,U

Number of distinct arrangements: 4!1!=24\frac{4!}{1!}=241!4!​=24

Case 2: First letter is NNN

Remaining letters: E,E,Q,UE,E,Q,UE,E,Q,U

Number of distinct arrangements: 4!2!=12\frac{4!}{2!}=122!4!​=12

So, number of words before those starting with QQQ is: 24+12=3624+12=3624+12=36


Step 2: Second letter of QUEEN is U

Now fix first letter as QQQ.

Remaining letters: E,E,N,UE,E,N,UE,E,N,U

We want second letter smaller than UUU. Letters smaller than UUU among remaining are EEE and NNN.

Case 1: Second letter is EEE

Remaining letters: E,N,UE,N,UE,N,U

Number of arrangements: 3!=63!=63!=6

Case 2: Second letter is NNN

Remaining letters: E,E,UE,E,UE,E,U

Number of arrangements: 3!2!=3\frac{3!}{2!}=32!3!​=3

So, words before those starting with QUQUQU are: 6+3=96+3=96+3=9

Running total: 36+9=4536+9=4536+9=45


Step 3: Third letter of QUEEN is E

Now fix first two letters as QUQUQU.

Remaining letters: E,E,NE,E,NE,E,N

There is no letter smaller than EEE among the remaining letters.

So contribution is: 000


Step 4: Fourth letter of QUEEN is E

Now fix first three letters as QUEQUEQUE.

Remaining letters: E,NE,NE,N

Again, there is no letter smaller than EEE among remaining letters.

Contribution: 000


Step 5: Fifth letter is fixed automatically

No contribution.


  1. Rank of QUEEN

Number of words before QUEEN is: 454545

Therefore, position of QUEEN is: 45+1=4645+1=4645+1=46

So the word QUEEN is at the 46th position.


  1. Option check
  • A: 444444th ❌
  • B: 454545th ❌
  • C: 464646th ✅
  • D: 474747th ❌

Hence, the correct option is C.

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