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How many natural numbers from 1 to 1000 ...

How many natural numbers from 1 to 1000 have none of their digits repeated ?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. How many 3-digit numbers are there without repetition?

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  2. How many 4-digit numbers are there with no digit repeated?

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  3. How many natural numbers from 1 to 1000 have none of their digits repe...

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  4. How many 3-digit even numbers can be made using the digits 1, 2, 3, 4,...

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

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  6. Find the number of 4-digit numbersthat can be formed using the digits ...

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  7. How many numbers lying between 100 and 1000 can be formed with the dig...

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  8. How many 4 digits numbers can be formed from the digits 1 to 9 if not ...

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  9. How many 4-digit numbers are there with no digit repeated?

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  10. How many 6-digit numbers can be formed from the digits 0, 1, 3, 5, 7 a...

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  11. Ten horses are running a race. In how many ways can these horses come ...

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  12. From a committee of 8 persons, in how many ways can we choose a chairm...

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  13. From a pool of 12 candidates, in how many ways can we select president...

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  14. Four alphabets E, K, S and V, one in each were purchased from a plasti...

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  15. Show that there are 4536 numbers between 1000 and 10000, which have no...

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  16. How many natural numbers not exceeding 4321 can be formed with the dig...

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  17. From the digits 1, 2, 3, 4, 5, 6, how many three-digit odd numbers can...

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  18. How many of the natural numbers can be formed from the digits 2, 3, 5,...

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

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  20. In a certain city, all telephone numbers have six digits, the first tw...

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