There are 20 couples in a party. Every person greets every person except his or her spouse. People of the same sex shake hands and those of opposite sex greet each other with a namaskar (It means bringing one's own palms together and raising them to the chest level). What is the total number of handshakes and namaskar's in the party?

A.

760

B.

1140

C.

780

D.

720

• There are 20 men and 20 women.
  When a man meets a woman, there are two namaskars, whereas when a man meets a man (or a woman) there is only 1 handshake.
  
  Number of handshakes =2×20C2 (men and women ) =2*380=760
  For number of Namskars Every man does 19 namaskars (to the 20 women excluding his wife) and they respond in the same way.
  
  Number of Namaskars =(20)(19)=380
  Total =760+380= 1140
• 10 years agoHelpfull: Yes(1) No(0)