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yrelhan4

  • 2 years ago

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

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  1. yrelhan4
    • 2 years ago
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    @shubhamsrg

  2. yrelhan4
    • 2 years ago
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    @DLS

  3. DLS
    • 2 years ago
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    smallest square?

  4. DLS
    • 2 years ago
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    nahi,nahi ho sakta :O galat question hai :|

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

  6. yrelhan4
    • 2 years ago
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    But a better explanation would be even better..

  7. DLS
    • 2 years ago
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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

  8. DLS
    • 2 years ago
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    hope u got it :)

  9. yrelhan4
    • 2 years ago
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    :/

  10. shubhamsrg
    • 2 years ago
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    7 chosen ki 3 chosen ?

  11. yrelhan4
    • 2 years ago
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    7 choslo..

  12. DLS
    • 2 years ago
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    merko samaj agaya shayad :/

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

  14. yrelhan4
    • 2 years ago
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    umm. upar 20 hai.. 20/64C7..

  15. shubhamsrg
    • 2 years ago
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    ohh :O hmm

  16. DLS
    • 2 years ago
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    merko samaj agaya 20 kyun hai :")

  17. DLS
    • 2 years ago
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    !!!!!!

  18. yrelhan4
    • 2 years ago
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    kyun??

  19. DLS
    • 2 years ago
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    wait upload karta hooon drawing

  20. shubhamsrg
    • 2 years ago
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    aa gaya 20 yo maine 1 diagnol miss kar diya tha

  21. yrelhan4
    • 2 years ago
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    abbe koi mereko btayega? :/

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

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

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

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

  27. DLS
    • 2 years ago
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    so 8c7+7c7+7c7

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

  29. DLS
    • 2 years ago
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    wahi to kiya :O

  30. DLS
    • 2 years ago
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    mai sirf bracket ke andar ka part bata raha tha

  31. shubhamsrg
    • 2 years ago
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    kaise kar lete ho @DLS how? :O

  32. DLS
    • 2 years ago
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    mai sirf ek side ka bata raha hoon

  33. yrelhan4
    • 2 years ago
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    ohho.. ok samajh gya. thank you.

  34. DLS
    • 2 years ago
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    induction :")))

  35. DLS
    • 2 years ago
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    sab clear hojaega isse :|

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