Which of the following is the best definition of probability?
AThe measure of how likely an event is to occur
BThe number of events that are likely to occur
CThe number of events that are random
DThe measure of which events are unpredictable
AThe measure of how likely an event is to occur
BThe number of events that are likely to occur
CThe number of events that are random
DThe measure of which events are unpredictable