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How many different signals can be genera...

How many different signals can be generated from 6 flags of different colours if each signal makes use of all the flags at a time, placed one below the other?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. How many 3-digit even numbers can be formed from the digits 1, 2, 3, 4...

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  2. In how many ways can five children stand in a queue ?

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  3. How many different signals can be generated from 6 flags of different ...

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  4. Seven songs are to be rendered in a programme. In how many different o...

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  5. There are 6 items in column A and 6 items in column B. A student is as...

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  6. How many 3-digit numbers are there without repetition?

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  7. How many 4-digit numbers are there with no digit repeated?

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  8. How many natural numbers from 1 to 1000 have none of their digits repe...

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  9. How many 3-digit even numbers can be made using the digits 1, 2, 3, 4,...

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

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  11. Find the number of 4-digit numbersthat can be formed using the digits ...

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  12. How many numbers lying between 100 and 1000 can be formed with the dig...

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  13. How many 4 digits numbers can be formed from the digits 1 to 9 if not ...

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  14. How many 4-digit numbers are there with no digit repeated?

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  15. How many 6-digit numbers can be formed from the digits 0, 1, 3, 5, 7 a...

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  16. Ten horses are running a race. In how many ways can these horses come ...

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  17. From a committee of 8 persons, in how many ways can we choose a chairm...

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  18. From a pool of 12 candidates, in how many ways can we select president...

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  19. Four alphabets E, K, S and V, one in each were purchased from a plasti...

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  20. Show that there are 4536 numbers between 1000 and 10000, which have no...

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