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Number of bijections from Set-A containi...

Number of bijections from Set-A containing n elements onto itself is 720 then n is

A

5

B

6

C

4

D

7

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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  3. Number of bijections from Set-A containing n elements onto itself is 7...

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  4. Number of Surjections from Set - A containing n elements to the Set -B...

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  5. The number of ways in which 10 letters can be posted in 5 letter boxe...

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  6. The number of ways of wearing 6 different rings to 5 hands is

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  7. There are 3 candidates for a lecturership and one is to be selected by...

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  8. Number of ways in which 4 prizes can be distributed among 5 students i...

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  9. If a student is eligible for all the prizes is

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  10. number of ways in which 4 prizes can be distributed among 5 students I...

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  11. In an examination there are there are three multiple choice qu...

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  12. In a library, there are 6 copies of one book, 4 copies each of two dif...

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  13. The number of ways in which the letters of ‘ARRANGE' be arranged so th...

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  14. The number of ways in which the letters of ‘ARRANGE' be arranged so th...

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  15. The number of ways in which the letters of ‘ARRANGE' be arranged so th...

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  16. The number of ways in which the letters of ‘ARRANGE' be arranged so th...

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  17. The number of ways in which the letters of the word 'PROPORTION' be ar...

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  18. The number of numbers greater than 50,000 that can be formed by using ...

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  19. The number of different nine digit numbers can be formed from the numb...

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