Fish with Mercury: Fish that contain high levels of mercury should be avoided. Mercury consumed during pregnancy has been linked to developmental delays and brain damage. A sample of these types of fish includes: shark, swordfish, king mackerel, and tilefish.
P(A or B) = P(A) + P(B) Addition Rule 2:: When two events, A and B, are non-mutually exclusive, there is some overlap between these events. The probability that A or B will occur is the sum of the probability of each event, minus the probability of the overlap.
(`A POSTERIORI' DEFINITION OF PROBABILITY): If a random experiment is repeated a large number of times, say n times, under. identical conditions and if an event A is observed to occur m times, then the probability of. the event A is defined as the LIMIT of the relative frequency m/n as n tends to infinitely. Symbolically, we write.