20 men handshake with each other without repetition. What is the total number of handshakes made?
A. 190
B. 210
C. 150
D. 250
E. None of these
Answer: Option A
Solution(By Examveda Team)
Choosing 2 people out of 20 will result in a handshake and the same can be done in 20C2 ways$${ \Rightarrow ^{20}}{C_2} = \frac{{20 \times 19}}{{2!}} = 190$$
Related Questions on Permutation and Combination
A. 3! 4! 8! 4!
B. 3! 8!
C. 4! 4!
D. 8! 4! 4!
A. 7560,60,1680
B. 7890,120,650
C. 7650,200,4444
D. None of these
A. 8 × 9!
B. 8 × 8!
C. 7 × 9!
D. 9 × 8!
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