4th Class Mental Ability Days and Dates & Possible Combinations Question Bank Days and Dates & Possible Combinations

  • question_answer In a party, 8 friends met. Each friend shook hands with each other exactly once. How many handshakes are there?

    A)  30                               

    B)  28             

    C)  36                               

    D)  34

    Correct Answer: B

    Solution :

     i 8 Friends = (A, B, C, D, E, F, G, H) Number of handshakes (AB, AC, AD, AE, AF, AG, AH, BC, BD, BE, BF, BG, BH, CD, CE, CF, CG, CH, DE, DF, DG, DH, EF, EG, EH, FG, FH, GH) = 28              

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