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How many three figure numbers can be formed with the digits 1,2,3,4,5,6,7,8,9 , if there is no restriction on the repetition of the digits ?

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CHHAYA PUBLICATION-PERMUTATION AND COMBINATION -EXERCISE 7A ( Very Short Answer Type Questions )
  1. If .^(9)P(5)+5.^(9)P(4)=^(10)P(r), find r.

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  2. In how many different ways can 4 prizes be distributed among 10 studen...

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  3. On entering a certain town ,4 travellers find that there are 5 hotels ...

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  4. 12 ferry - steamers ply between Chandpal Ghat and Botanical Garden . I...

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  5. There are 12 stations on a certain railway line . How many different k...

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  6. How many different permutations can be made by taking all the letters ...

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  7. Find the number of ways in which the letters of the word DRAUGHT can b...

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  8. How many numbers each lying between 100 and 1000 can be formed with th...

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  9. Find the number of different perpmutations that can be made out of the...

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  10. Find the number of different perpmutations that can be made out of the...

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  11. Find the number of different perpmutations that can be made out of the...

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  12. Find the number of different perpmutations that can be made out of the...

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  13. Find the number of different perpmutations that can be made out of the...

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  14. In how many ways can the letters of the name Gavaskar be arranged so t...

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  15. In how many ways can the results of 3 successive football matches be d...

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  16. In how many ways can a person post 5 letters in 4 letters boxes ?

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  17. In how many ways four prizes - one for recitation , one for sports , o...

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  18. How many three figure numbers can be formed with the digits 1,2,3,4,5,...

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  19. An unbiased coin is tossed 5 times in succession . How many different...

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  20. A six faced unbiased dice is rolled 4 times . How many different outc...

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