15 chess players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?	Choose the correct choice from the following answers:
A) 190
B) 200
C) 210
D) 220
E) 225
Though 2*(15C2) is the correct approcah to do this, but for people like me who find Perm, Comb n Prob a nightmare, an easy approach can be used.   The first guy has to play 2 matches with the rest of 14, so he'll play 28 matches.   Similarly, second guy has to play with the rest of 13 as his 2 games with the first guy are already played. So he plays 26 matches.   This continues like this and the total matches are 28+26+24...+2   28+26+...+2 = 2(14+13+...+1) = 2((14*15)/2) = 14*15= 
<gadget id="calculator">14*15</gadget>
<output>210</output>
210.   ANSWER:210
<result>C</result>
15 chess players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?