Question

what are the 4 rules of probability?

Answer 1

sum of probabilities equals one

Answer 2

The predictions Can be wrong..........lol

Answer 3

I think it should be probability should not exceed 1

Answer 4

Because sum can be any

Answer 5

There is the (And and Or) Rule

Answer 6

It happens or else it doesn't. The probabilty of an event happening added the probability of it not happing is always 1.
P(A happens) + P(A doen't happen) = 1

2. Exclusivity. If A and B can't both happen at the same time (in which case we say that A and B are mutually exclusive), then
P(either A or B happens) = P(A happens) + P(B happens)

3. Independence. If B is no more or less likely to happen when A happens than when A doesn't (in which case we say that A and B are independent), then
P(A and B both happen) = P(A happens) * P(B happens)

4. Sub-Events. If whenever A happens B must also happen, then B must be at least as likely as A, so
P(A happens) <= P(B happens)

Answer 7

Now in the And rule u multiply and in the Or rule u add

Answer 8

This question is inexact (and who says there are only 4 rules anyway.-)

Answer 9

axioms ?

Answer 10

Should be like that, there is more than one version of probability theory out there.

And it seems this question is only addressing the theory not the practice (stats)

Answer 11

You can look up Skyrmes SIX rules of probability.