In a party every person shakes hands with every other person. If there were a total of 153 handshakes in the party then what is the number of persons present in the party ? Choose the correct answer: A) 15 B) 16 C) 17 D) 18 E) 19
Explanation :   Let the number of persons be n   âˆ´ total handshakes = nC2 = 153   n(n-1)/2 = 153 âˆ´ n = 18   Answer : Option 18
<result>D</result>
In a party every person shakes hands with every other person. If there were a total of 153 handshakes in the party then what is the number of persons present in the party ?