17 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 answer.
A) 154
B) 184
C) 240
D) 272
E) 306
2*17C2 = 2*136= 
<gadget id="calculator">2*136</gadget>
<output>272</output>
272   The answer is 272.
<result>D</result>
17 chess players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?