what is mean by prabality in numerical methods, type of prabablitys?

Answer 1

Not sure what you are asking.

Answer 2

Sounds like a dreadful American pronunciation of Probability, which is a term used to describe the statistics of random events. If an event is certain, its probability is 1.0. If it never happens, it has a probability of Zero (0.0). An event that occurs half of the time (heads you lose) has a probability of 0.5. Each face of a fair dice throw has a probability of 1/6, and so on. Theories and formulae of probability exist which allow you to handle more complex cases, these are described in any reasonable statistics textbook.