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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

Manish , 10 Years ago
Grade 12
anser 1 Answers
bharat bajaj

Last Activity: 10 Years ago

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
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