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MathematicsMathematics
7 January, 10:08

Four people in a room. Each shakes hands with each of the others once. How many handshakes are there?

6

10

12

16

22

+4
Answers (1)
  1. 7 January, 10:18
    0
    The correct answer is 6.

    The clearest way to determine this is by creating a table of possible hand shaking. If we label the people A-D, the following are the ways they can be combined:

    AB

    AC

    AD

    BC

    BD

    CD

    There are no other combinations.
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