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Five boys and five girls form a line wit...

Five boys and five girls form a line with the boys and girls alternating. Find the number of ways of making the line.

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RD SHARMA ENGLISH-PERMUTATIONS-All Questions
  1. Find the number of ways in which 5 boys and 5 girl be seated in a row ...

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  2. Five boys and five girls form a line with the boys and girls altern...

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  3. How many even numbers are there with three digits such that if 5 is...

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  4. How many four digit numbers divisible by 4 can be made with the digits...

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  5. Find the number of arrangements of the letters of the BIRTH.

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  6. (i) How many different words can be formed with letters of the word ‘S...

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  7. Find the number of arrangements of the letters of the EXAM

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  8. A tea party is arranged for 16 persons along two sides of a long table...

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  9. In how many ways can the letters of the word PERMUTATIONS be arrang...

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  10. In how many ways can a lawn tennis mixed double be made up from seven ...

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  11. The number of different of different ways in which 8 persons can stand...

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  12. Prove that 33! is divisible by " 2^15. what is the largest integer n s...

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  13. Find the number of arrangements of the letters of the MISS.

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  14. Prove that (n !+1) is not divisible by any natural number between 2 a...

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  15. Prove that: ((2n)!)/(n !)={1. 3. 5 (2n-1)}2^ndot

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  16. If (n !)/(2!(n-2)!) and (n !)/(4!(n-4)!) are in the ratio 2:1 , find t...

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  17. Find n , if (n+2)! =2550xxn !

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  18. If 1/(9!)+1/(10 !)=x/(11 !) , find xdot

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  19. Prove that: n(n-1)(n-2)....(n-r+1)=(n !)/((n-r)!)

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  20. If w(1).w(2),w(3) and w(4) are work done in isothermal, adiabatic, iso...

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