There are three ski jumping events on the 2010 Olympic program:
The "K" refers to the K-point - the point on the respective hills that is used to calculate distance points awarded to jumpers. On the normal hill, the K-point is 95 meters from the takeoff, and on the large hill, the K-point is 125 meters from the takeoff.
The normal hill and large hill are both individual events, in which the competitor receiving the most points (awarded for a combination of distance and style) will win gold.
The team (K125) competition is contested on the large hill, with four jumpers per country. The nation with the highest cumulative score from all its combined jumps wins gold.