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In a certain city, all telephone numbers...

In a certain city, all telephone numbers have six digits If repetition of digits is possible, how many telephone numbers are there in the city.

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A N EXCEL PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTION BANK
  1. Consider the word ‘RESHMA’ How many different words can be formed usin...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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