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How many numbers can be formed from the digits 1,2,3 and 9 if repetition of digits is not allowed?

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MAXIMUM PUBLICATION-PERMUTATION AND COMBINATIONS-EXAMPLE
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  2. In how many ways can 5 persons sit in a car, two Including the driver ...

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  3. How many numbers can be formed from the digits 1,2,3 and 9 if repetiti...

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

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

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

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  7. How many 8 letter words, with or without meaning, can be formed using ...

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  8. Find the number of ways in which the letters of the word ASSISTANT can...

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  9. Find the number of different signals that can be made by arranging at ...

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  10. Find the value of n such that nP5=42 xx nP3,n>4

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  11. Find the value of n such that (n-1)P3 : nP4=1:9

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  12. Find the value of r if 5 xx 4Pr = 6 xx 5P(r-1)

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  13. Find the value of r if 5Pr = 6P(r-1)

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  14. The letters of the word TUESDAY are arranged in a line, each arrangeme...

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  15. The letters of the word TUESDAY are arranged in a line, each arrangeme...

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  16. Consider the word ANNAMALAI How many new words can be formed using t...

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  17. Consider the word ANNAMALAI Among the new words how many of them wil...

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  18. Find the rank of the word NAAGI, if these words are written as in a di...

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  19. A committee of 3 persons is to be constituted from a group of 2 men an...

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  20. A committee of 3 persons is to be constituted from a group of 2 men an...

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