Two points are moving on the cycle in opposite directions. They meet each other after every 4 seconds. The length of the cycle is 100 meters, and one point is 5 m/sec faster than the other one. Find the speeds of the points.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.