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Question

Mathematics Question on permutations and combinations

If all the words (with or without meaning) having five letters, formed using the letters of the word SMALLSMALL and arranged as in a dictionary; then the position of the word SMALLSMALL is:

A

46th46^{th}

B

59th59^{th}

C

52th52^{th}

D

58th58^{th}

Answer

58th58^{th}

Explanation

Solution

ALLMSA(LLMS)4!2!=242=12A LL MS A (LL MS) \rightarrow \frac{4 !}{2 !}=\frac{24}{2}=12
L(ALMS)4!=24L ( AL MS ) \rightarrow 4 !=24
M(ALLS)4!2!=242=12M (ALLS) \rightarrow \frac{4 !}{2 !}=\frac{24}{2}=12
SA(MLL)3!2!=3SA ( MLL ) \rightarrow \frac{3 !}{2 !}=3
SL(ALM)3!=6SL ( ALM ) \rightarrow 3 !=6
Total words =12+24+12+3+6=57=12+24+12+3+6=57
SMALL58thSMALL \,\,\,\,\,58^{t h}
\therefore the position of the word SMALLSMALL is 58th58^{t h}