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How many words can be formed with the le...

How many words can be formed with the letters of the words ‘ORDINATE’ so the vowels occupy odd places?

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RD SHARMA ENGLISH-PERMUTATIONS-All Questions
  1. If a denotes the number of permutations of (x+2) things taken all at a...

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  2. In how many ways can 9 examination papers arranged so the best and the...

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  3. How many words can be formed with the letters of the words ‘ORDINATE’ ...

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  4. A code word is to consist of two distinct English alphabets followed b...

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  5. In how many ways can 5 children the arranged in a row such that two of...

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  6. How many words can be formed from the letters of the word, TRIANGLE? ...

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  7. (i) How many different words can be formed with letters of the word ‘S...

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  8. In how many ways can 5 girls and 3 boys be seated in a row so that ...

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  9. How many words can be formed with the letters of the words ‘ORDINATE’ ...

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  10. When a group photograph is taken, all the seven teachers should be in ...

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  11. In a class of 10 students there are 3 girls A, B, C. In how many di...

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  12. Compute: (20 !)/(18 !)

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  13. Compute: (10 !)/(6! 10 !)

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  14. Convert the following products into factorial: 6.7.8.9.10

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  15. Convert the following products into factorial: 2.4.6.8.10

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  16. Find the LCM of 4! 5! and 6!

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  17. Compute: (30 !)/(28 !)

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  18. Compute: (11 !-10 !)/(9!)

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  19. Prove that: 1/(9!)+1/(10 !)+1/(11 !)=(122)/(11 !)

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  20. Find\ x in each of the following: 1/(4!)+1/(5!)=x/(6!)

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