Permutations and combinations - Quantitative Aptitude (MCQ) questions for Q. 28871

Q.  In a class, there are 15 students. During a Christmas party all of them shook hands with each other only once. How many handshakes took place in the class?
- Published on 27 Mar 17

a. 120
b. 210
c. 105
d. 55

ANSWER: 105
 
permutation combination

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