a) 760
b) 1140
c) 780
d) 720
Answer: b
Explanation: There are 20 men and 20 women.
When a man meets a woman, there are two Namastes, whereas when a man meets a man (or a woman) there is only 1 handshake.
Number of handshakes, = 2 × 20C2 (men and women ) = 2 × 190 = 380
For a number of Namastes, Every man does 19 Namastes (to the 20 women excluding his wife) and they respond in the same way.
Number of Namastes
= 2 × 20 × 19
= 760
Total number of Namastes and Handshake
= 760 + 380
= 1140
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