Overcard question

[kingstalker]

Got a quick question, if I have J-J and raised a decent amount before the flop and get called by one player, flop comes down with one overcard say a king, what are the odds that my opponet has a pair of kings?

[flopdanutz]

50-50 he either has it or he doesnt

if your opponent played 2 random cards the odds of not having it are
44/47 * 43/46 = 87.51%

12.49% of having a king

if your opponent plays decent starting hands only, it is more probable he has a king.