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Find the number of 4 letter words, wịth ...

Find the number of 4 letter words, wịth or without meaning, which can be formed out of the letters of the word ROSE, where the repetition of the letters is not allowed.

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V PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTIONBANK
  1. Find the number of 4 letter words, wịth or without meaning, which can ...

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  2. Given 5 flags of different colours. How many different singnals can be...

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  3. How many two digit even number with distinct digits can be formed from...

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  4. Find the number of different signals that can be made by arranging at ...

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  5. How many 3-digit numbers can be formed from the digits 1,2,3,4 and 5 a...

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  6. How many 3-digit even numbers can be formed from the digits 1,2,3,4,5,...

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  7. How many 4-letter code can be formed using the first 10 letters of the...

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  8. How many 5-digit telephone numbers can be constructed using the digits...

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  9. A coin is tossed 3 times and the outcomes are recorded. How many possi...

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  10. Given 5 flags of different colours. How many different singnals can be...

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  11. Evaluate. (i) 5 ! ii) 7 ! (iii) 7 !-5 !

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  12. Evalute the following: (12!)/(10! xx 2!)

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  13. Evaluate (n !)/((r )!(n-r) !), when n=5, r =2

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  14. IF 1/(8!) +1/(9!) = x/(10!) , find x.

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  15. Evaluate 4!-3!

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  16. Is 3!+4!=7! ?

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  17. Compute (8!)/(6!xx2!)

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  18. if 1/(6!) +1/(7!) = x/(8!) , find x.

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  19. Evaluate (n!)/((n-r)!) n = 9, r = 5

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  20. Find the number of permutation of the letters of the word ALLAHABAD.

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