Question

At the end of a dinner party all the eight people present shake hands with each other once. How many handshakes will there be altogether ?

• A. 8
• B. 16
• C. 28
• D. 64

Answer 1

The correct option is C 28

Number of hand shakes with each other once
$=\frac{\left(n\right)(n-1)}{2}$
where 'n' represents no. of people present in party. Therefore, no. of handshakes
$=\frac{8\times 7}{2}=28$