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How many numbers of four digits can be f...

How many numbers of four digits can be formed by using the digits 1, 3, 5, 7, 9, a digit being repeated any number of times in any number ?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. How many numbers greater than 1000000 can be formed by using the digit...

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

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  3. How many numbers of four digits can be formed by using the digits 1, 3...

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  4. How many numbers between 20,000 and 30,000 can be formed by using the ...

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  5. How many numbers greater than one lac can be formed by using the digit...

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  6. How many different signals can be transmitted by arranging 3 red, 2 ye...

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  7. In how many ways can 5 flags, in which 3 are red, one is white and one...

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  8. Find the number of arrangements, which can be made from the letters of...

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  9. Find the number of arrangements, which can be made from the letters of...

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  10. Find the number of arrangements, which can be made from the letters of...

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  11. Find the number of arrangements, which can be made from the letters of...

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  12. Find the number of arrangements, which can be made from the letters of...

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  13. Find the number of arrangements, which can be made from the letters of...

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  14. Find the number of arrangements, which can be made from the letters of...

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  15. Find the number of arrangements, which can be made from the letters of...

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  16. Find the number of arrangements, which can be made from the letters of...

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  17. Find the number of arrangements, which can be made from the letters of...

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  18. In how many of the distinct permutations of the letters in MISSISSIPPI...

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  19. There are five round stickers, 3 of them are red and the other two are...

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  20. How many words can be formed using the letter A thrice. the letter B t...

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