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The number of natural numbers smaller th...

The number of natural numbers smaller than `10^(4)` of which all digits are different, is

A

5275

B

`10!.9!`

C

5273

D

5274

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The correct Answer is:
D
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
  1. The total number of 9 digit numbers which have all different digits is

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  2. The total number of 8 digited numbers which have all different digits ...

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  3. The number of natural numbers smaller than 10^(4) of which all digits ...

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  4. The number of all possible numbers formed out of 1, 2, 3, 4 without re...

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  5. Number of 2 digit even numbers that can be formed from the digits 1, 2...

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  6. The number of 4 digited even numbers that can be formed using the digi...

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  7. The number of even numbers between 200 and 20,000 can be formed with t...

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  8. The number of numbers greater than 23000 can be formed from 1, 2, 3, 4...

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  9. The number of four digit numbers that can be formed using the digits 1...

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  10. The number of different signals which can be given from 7 different co...

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  11. The number of 5 letter that can be formed using the letters of ...

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  12. The number of four digit telephone numbers formed by the digits is (No...

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  13. Four dice are rolled then the number of possible out comes is

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  14. A letter lock consists of 4 rings each marked with 10 different letter...

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  15. If ninN and 300ltnlt3000 and n is made of digits by taking from 0, 1, ...

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  16. 5 dice are thrown then the number of out comes in which there is atlea...

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  17. In a town the car plate numbers contain only three or four digits, not...

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  18. The number of functions that can be defined from a set containi...

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  19. The numbers of the one one function that can be defind from A ={...

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  20. The number of one - one functions that can be defined from A={a, b, c,...

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