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Find the number of different signals tha...

Find the number of different signals that can be made by arranging at least three flags in order on a vertical pole, if 6 different flags are available.

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. How many 5-digit telephone numbers can be constructed using the digits...

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  2. Given (i) 4 flags (ii) 5 flags of different colours, how many differen...

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

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

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  5. Kartar goes to a movie. The cinema hall has two entrances and three ex...

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  6. Find the number of different signals that can be generated by arrangin...

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  7. In a monthly test, the teacher decides that there will be three questi...

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  8. The students in a class are seated according to the marks in the previ...

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  9. Eight children are to be seated on a bench. In how many ways can the c...

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  10. Eight children are to be seated on a bench. How many arrangements are ...

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

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  12. A coin is tossed three times and the outcomes are recorded. How many p...

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  13. A class consists of 40 girls and 60 boys. In how many ways can a presi...

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  14. How many numbers are there between 100 and 1000 such that 7 is in the ...

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  15. How many numbers are there between 100 and 1000 such that at least one...

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  16. How many of them have exactly one of their digits as 7 ?

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  17. A mint prepares metallic calendars specifying months, dates and days i...

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  18. For a set of five true or false questions, no student has written all ...

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  19. How many automobile licence plates can be made if the inscription on e...

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  20. The Licence plates for vehicles registered in Delhi consist of 3 lette...

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