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In a certain city, all telephone numbers...

In a certain city, all telephone numbers have six digits How many telephone numbers are there with all digits distinct and which start with 41 or 42 or 46 or 62 or 64

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A N EXCEL PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTION BANK
  1. In a certain city, all telephone numbers have six digits How many tele...

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  2. In a certain city, all telephone numbers have six digits If repetition...

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  3. In a certain city, all telephone numbers have six digits How many tele...

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  4. Suppose that words are formed by permuting all the letters of the word...

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  5. Suppose that words are formed by permuting all the letters of the word...

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  6. If the letters of the word DHRONA be permuted and arranged as in a dic...

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  7. Find the number of arrangements of 6 boys and 5 girls in a row so that...

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  8. Find the number of arrangements of 6 boys and 5 girls in a row so that...

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  9. Show that there are 300 numbers gt 1000 and lt 10,000 which can be fo...

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  10. Find the number of permutations of the letters of the word ‘DADOO’

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  11. Consider the word DADOO. How many end with O?

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  12. Suppose that all the letters of the word ‘HARYANA’ are permuted and wo...

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  13. Suppose that all the letters of the word ‘HARYANA’ are permuted and wo...

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  14. Suppose that all the letters of the word ‘HARYANA’ are permuted and wo...

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  15. Suppose that the different permutations of the word ‘EXAMINATION’ are ...

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  16. Suppose that the different permutations of the word ‘EXAMINATION’ are ...

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  17. Suppose that 4 prizes are distributed among 5 students Find the number...

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  18. Suppose that 4 prizes are distributed among 5 students Find the number...

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  19. Suppose that 4 prizes are distributed among 5 students Find the number...

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  20. There are 20 persons, among whom two are brothers. Find the number of ...

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