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yrelhan4

If 7 smallest squares are chosen at random from a chessboard then the probability that they lie on diagonal, is ?

  • 11 months ago
  • 11 months ago

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  1. yrelhan4
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    @shubhamsrg

    • 11 months ago
  2. yrelhan4
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    @DLS

    • 11 months ago
  3. DLS
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    smallest square?

    • 11 months ago
  4. DLS
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    nahi,nahi ho sakta :O galat question hai :|

    • 11 months ago
  5. yrelhan4
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    nvm. i think... i got it. http://www.allinterview.com/showanswers/8354.html

    • 11 months ago
  6. yrelhan4
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    But a better explanation would be even better..

    • 11 months ago
  7. DLS
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    There are total of 64 blocks on a chessboard. So 3 blocks can be chosen out of 64 in 64C3 ways. So the sample space is = 41664 There are 2 diagonal on chessboard each one having 8 blocks. Consider one of them. 3 blocks out of 8 blocks in diagonal can be chosen in 8C3 ways. But there are 2 such diagonals, hence favourables = 2 * 8C3 = 2 * 56 = 112 The require probability is = 112 / 41664 = 1 / 372 = 0.002688

    • 11 months ago
  8. DLS
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    hope u got it :)

    • 11 months ago
  9. yrelhan4
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    :/

    • 11 months ago
  10. shubhamsrg
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    7 chosen ki 3 chosen ?

    • 11 months ago
  11. yrelhan4
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    7 choslo..

    • 11 months ago
  12. DLS
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    merko samaj agaya shayad :/

    • 11 months ago
  13. shubhamsrg
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    oh, 7 choslo hai..hmm mera to 18/C(64,7) aa raha hai :3

    • 11 months ago
  14. yrelhan4
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    umm. upar 20 hai.. 20/64C7..

    • 11 months ago
  15. shubhamsrg
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    ohh :O hmm

    • 11 months ago
  16. DLS
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    merko samaj agaya 20 kyun hai :")

    • 11 months ago
  17. DLS
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    !!!!!!

    • 11 months ago
  18. yrelhan4
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    kyun??

    • 11 months ago
  19. DLS
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    wait upload karta hooon drawing

    • 11 months ago
  20. shubhamsrg
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    aa gaya 20 yo maine 1 diagnol miss kar diya tha

    • 11 months ago
  21. yrelhan4
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    abbe koi mereko btayega? :/

    • 11 months ago
  22. shubhamsrg
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    dekho 8 sq. wale 2 diagnols hote hain 7 sq wale 4 diagnols hote hain hai na?

    • 11 months ago
  23. DLS
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    • 11 months ago
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  24. DLS
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    3 tarah se le sakte hai 8c7 lelia aur 7c7 aur 7c7 se bhi

    • 11 months ago
  25. DLS
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    baaki green waaale nahi le sakte 7 nahi hai condition satisfy nahi karte

    • 11 months ago
  26. DLS
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    red waala aur 2 green waale hain acceptable case

    • 11 months ago
  27. DLS
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    so 8c7+7c7+7c7

    • 11 months ago
  28. yrelhan4
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    hmm.. 2(8c7+7c7+7c7) nhi krna chahiye? us figure me / vale diagonals hain.. \ vale diagonals?

    • 11 months ago
  29. DLS
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    wahi to kiya :O

    • 11 months ago
  30. DLS
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    mai sirf bracket ke andar ka part bata raha tha

    • 11 months ago
  31. shubhamsrg
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    kaise kar lete ho @DLS how? :O

    • 11 months ago
  32. DLS
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    mai sirf ek side ka bata raha hoon

    • 11 months ago
  33. yrelhan4
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    ohho.. ok samajh gya. thank you.

    • 11 months ago
  34. DLS
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    induction :")))

    • 11 months ago
  35. DLS
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    sab clear hojaega isse :|

    • 11 months ago
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