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it's 6. the first person has a handshake with 3 others. the second person has two more handshakes, since the 3 former handshakes already includes the first person. the third person has one more handshake with the last person, since the handshake with the first two have already been included. The last person has already had a handshake with everyone.
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Comments (7)
The answer is 6
The answer is 6.
Each person shakes hands with another person just one time. There're four persons.
- If the first person shakes the hands of 3 other persons that is 3 hand shakes.
- 3 persons are left who have not shake hands with anyone. If the second person shakes with the 2 third and fourth person. That is 2 hand shakes.
- We now have have the third and fourth persons who shake hands with one another = 1 hand shake.
very good question
it's 6. the first person has a handshake with 3 others. the second person has two more handshakes, since the 3 former handshakes already includes the first person. the third person has one more handshake with the last person, since the handshake with the first two have already been included. The last person has already had a handshake with everyone.
it's combinations not permutations