Wipro
Company
Numerical Ability
Probability
Everyone shakes hands with everyone else in a room. Total number of handshakes is 66. Number of persons=?
A. 14
B. 13
C. 11
D. 12
E. 10
Read Solution (Total 1)
-
- 66 handshakes,
so the member be n
n(n-1)/2=66
n(n-1)=132
n^2-n=132
n^2-n-132=0
solve this eqn.
n= 12
then number of persons is 12
- 12 years agoHelpfull: Yes(1) No(0)
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