Let's say you have 6 option job to choose. If you have a job with a low paid and a job with a high paid that is considered mutually exclusive, then the probability of low paid job or high paid job is simply:

p(L or H) = p(L) + p(H).

@L - low pay job
@H - high pay job

What is the probability of getting either a low paid job or a high paid job? Since it is impossible to get both job at the same time, these two events are mutually exclusive. Therefore,

p(1 or 6) = p(1) + p(6) = 1/6 + 1/6 = 1/3

If the low paid job and the high paid job are not mutually exclusive, then

p(L or H) = p(L) + p(H) - p(L and H).

The logic behind this formula is that when p(L) and p(H) are added, the occasions on which L and H both occur are counted twice. To adjust for this, p(L and H) is subtracted. What is the probability that a job selected will be either low paid job or high paid job? The relevant probabilities are:

p(L) = 4/52
p(H) = 13/52

What the f*&^ am I trying to say here?? Me dunoo either..hehehehe.. Well, the next blog will be the "Fairy Tale- Part 2". Hopefully I can get it done before I move to my new life..