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If the letters of the word 'RACHIT' are ...

If the letters of the word 'RACHIT' are arranged in all possible ways as listed in dictionary. Then, what is the rank of the word 'RACHIT' ?

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KUMAR PRAKASHAN-PERMUTATIONS AND COMBINATIONS-NCERT EXEMPLAR PROBLEMS (SHORT ANSWER TYPE QUESTIONS)
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  9. Find the number of permutations of n distinct things taken r together,...

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  11. Find the number of popstive integers greater than 6000 and less than 7...

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  13. There are 10 lamps in a hall, Each one of them can be switched on inde...

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  14. A box contains two white, there black and four red balls. In how many ...

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  15. if ""^nc(r-1)=36, ""^ncr=84 and ""^nc(r+1)=126,than find the value of ...

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  16. Find the number of integers greater than 7000 that can be formed with ...

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  18. In a certain city, all telephone numbers have six digits , the first t...

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