8 men entered a lounge simultaneously. if each person shook hands with the other then find the total no. of handshakes?
Answers
The first person will shake hands with 7 people. the second will shake hands with 6 people. If it goes on like this then
7+6+5+4+3+2+1=28 hand shakes
The logic behind the number of handshakes:
The first person will shake hand with the rest of the 7 people
The 2nd person will shake hand with the rest of the 6 people
The 3rd person will shake hand with the rest of the 5 people
The 4th person will shake hand with the rest of the 4 people
The 5th person will shake hand with the rest of the 3 people
The 6th person will shake hand with the rest of the 2 people
The 7th person will shake hand with the rest of the 1 people
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Total number of handshake = 7 + 6 + 5 + 4 + 3 + 2 + 1
Total number of handshake = 28
Answer: 28 handshakes altogether