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Thread: Riddle # 78 (Solved By ingenius)

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    grin Riddle # 78 (Solved By ingenius)

    Four people meet in a room. Each person shakes hands once with each other person. How many hand shakes are there in all?
    صرف آواز نہیں ، لفظ بھی مقفل ہیں مرے

    سوچ میں ہوں کہ اب تجھ کو پکاروں کیسے

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    Default Re: Riddle # 78

    12
    2112kjd - Riddle # 78 (Solved By ingenius)

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    Default Re: Riddle # 78

    no
    صرف آواز نہیں ، لفظ بھی مقفل ہیں مرے

    سوچ میں ہوں کہ اب تجھ کو پکاروں کیسے

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    Default Re: Riddle # 78

    acha chalo better luck next time
    2112kjd - Riddle # 78 (Solved By ingenius)

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    Default Re: Riddle # 78

    8...
    tum nay to pher b seekh liye zamne ki chal chalen faraz
    hum to kuch b na ker sake mohbaat k siwa

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    Default Re: Riddle # 78

    no
    صرف آواز نہیں ، لفظ بھی مقفل ہیں مرے

    سوچ میں ہوں کہ اب تجھ کو پکاروں کیسے

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    Default Re: Riddle # 78

    me nai ab gor say perha....per ab main ans nahi day raha
    tum nay to pher b seekh liye zamne ki chal chalen faraz
    hum to kuch b na ker sake mohbaat k siwa

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    Default Re: Riddle # 78

    de bhi nahi skte chance khatem ho gaya hai
    2112kjd - Riddle # 78 (Solved By ingenius)

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    Default Re: Riddle # 78

    6 handshakes. The people are A, B, C, and D.

    A-B.
    A-C.
    A-D.
    B-C.
    B-D.
    C-D.

    mathematically, it's a combination question.
    The formula for nCr is:

    nCr = n!/(r!*(n-r)!)

    So:

    4C2 = 4!/(2!*2!)
    = 4*3*2*1/(2*1*2*1)
    = 4*3*2/(2*2)
    = 4*3/2
    = 2*3
    = 6
    7289229 - Riddle # 78 (Solved By ingenius)

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    Default Re: Riddle # 78

    Quote Originally Posted by ingenius View Post
    6 handshakes. The people are A, B, C, and D.

    A-B.
    A-C.
    A-D.
    B-C.
    B-D.
    C-D.

    mathematically, it's a combination question.
    The formula for nCr is:

    nCr = n!/(r!*(n-r)!)

    So:

    4C2 = 4!/(2!*2!)
    = 4*3*2*1/(2*1*2*1)
    = 4*3*2/(2*2)
    = 4*3/2
    = 2*3
    = 6

    Factorial wale qst hain ye to
    nCr usi ka formula hai
    2112kjd - Riddle # 78 (Solved By ingenius)

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