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In how many ways can 3 people be seated ...

In how many ways can 3 people be seated in a row containing 7 seats ?

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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. If there are 20 steamers plying between places A and B, in how many wa...

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  2. In how many ways can 5 persons draw water from 5 taps, assuming no tap...

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  3. In how many ways can 3 people be seated in a row containing 7 seats ?

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  4. A sample of 3 bulbs is tested. A bulb is labelled ‘G’ if it is good a...

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  5. How many 4-letter code words are possible using the first 10 letters o...

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  6. Six pictures are to be arranged from left to right on a wall of an art...

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  7. The digits, from 0 to 9, are written on slips of paper and placed in a...

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  8. For a group photograph, 3 boys and 2 girls stand in a line in all poss...

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  9. How many 5-digit telephone numbers can be constructed using the digits...

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

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

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

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

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

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

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

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

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

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

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

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