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20 men handshake with each other without repetition. What is the total number of handshakes made?
Answer & Solution
Correct Answer:
Option
A
Choosing 2 people out of 20 will result in a handshake and the same can be done in 20C2 ways
$${ \Rightarrow ^{20}}{C_2} = \frac{{20 \times 19}}{{2!}} = 190$$
$${ \Rightarrow ^{20}}{C_2} = \frac{{20 \times 19}}{{2!}} = 190$$
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