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11th Class Mental Ability Numbers Question Bank Question - Number System

  • question_answer
    At the end of a business conference the ten people present all shake hands with each other once. How many handshakes will there be altogether?

    A) 20

    B) 45

    C) 55

    D) 90

    E) None of these

    Correct Answer: B

    Solution :

    Explanation Option (b) is correct. Clearly, total number of handshakes \[=\left( 9+8+7+6+5+4+3+2+1 \right)=45.\]


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