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Grade: 12 

                        
EVERYBODY IN A A ROOM SHAKES HANDS WITH EVERY BODY ELSE.THE TOTAL NUMBER OF HANDSHAKES IS 66.THE TOTAL NUMBER OF PERSONS IN THE ROOM IS? a)11 b)12 c)13 d)14
6 years ago

Answers : (1)

bharat bajaj
IIT Delhi
askIITians Faculty
122 Points 
							
total no of handshakes = nC2 = 66
n (n-1) /2 = 66
ior n(n-1) = 66*2 = 11*12
No. of people = 12
Thanks
Bharat Bajaj
IIT Delhi
askiitians faculty
6 years ago
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