In day to day conversation we normally use the terms chance etc. and generally people have a vague idea about its meaning. For example we come across statements like probably it may rain tomorrow it is likely that Mr. A may not coming for taking the class today, these all vague ideas are probability,
Definition of probability– The probability of a given event is an expression of likelihood or chance of occurrence of an event. A probability is a number which ranges from 0 to 1 zero for an event which cannot occur and 1 for an event certain to occur.