The IOC chooses sports to include based on a variety of things (including number of athletes, necessity of a venue, competitiveness, etc) and decides what sports will be included or not. In the case of some sports like Baseball and softball lack of competitiveness led to their removal. For Rugby in 1924, it was lack of sportsmanship (there was an incident at the last one) and lack of competitiveness. Now it will not be included because the IOC only includes sports when an equal (or nearly equal) number of men and women would be brought in and the sport is fairly equal (think swimming or diving).
In the Summer Olympics there are 301 events.
some events are swimming, running, high jump
2002 Olympics. Save
1960 Olympics
there are 32 events at the olympics.
The 2014 Olympics has 98 events.
Most of the events from the Modern Olympics originally came from the Ancient Olympics but many more events have been added to the Modern Olympics...
Luge, in the Olympics, is scored according to time. Some events are scored on a single time and some events are scored according to an accumulation of more than one run.
Olympics 2012
winter Olympics
The commonwealth and olympics
London Olympics