At the end of a conference, the ten people present all shakehands with each other once. How many shakehands will there be altogether
A20
B45
C55
D90
A20
B45
C55
D90
Related Questions:
The bar graph given below represents revenue of a firm for 8 years. All the revenue figures have been shown in terms of Rs. crores.What is the total value of revenue of the firm (in crores Rs.) in years 2010, 2011 and 2012?