Probability, in simple words it’s defined as the number of times an event is expected to repeat itself, and sometimes it becomes difficult to find out the probability of recurrence of an event hence there is a study which is totally based on finding the probability. Even in our regular lives we use the term probability in general like will it rain today or not, probably the price of share will go up or down hence probability is a very common term. There is always an uncertainty of every event, and hence the term probability came into picture.