What are the first and second laws of probability?

Question

Write the first and second laws of probability

Answer 1

"First Law of Probability states that the results of one chance event have no effect on the results of subsequent chance events.

Second Law of Probability, which states that the probability of independent chance events occurring together is the product of the probabilities of the separate events.


The Third Law of Probability considers what happens with chance events that are mutually exclusive, which means that they are not independent. In other words, if one event occurs then another event cannot occur. This frequently applies to combinations. For example, we could ask, What is the probability that in three coin flips, two heads and one tail will result? There are three possibilities for how this might occur:
Possibility 1: head-head-tail
Possibility 2: head-tail-head
Possibility 3: tail-head-head "


You will find more at this site (http://people2.hsc.edu/faculty-staff/edevlin/edsweb01/courses/Genetics/labmanual/lab1.htm) that has so wonderfuly stated not only two but the three laws of probability.