chapter 4 unit d e280

• likely hood, what's the chance it will occur, numerical value between 0 and 1
• 0 impossible
• 1 definite event

all possible outcome (ex coin heads and tails)

when we do something to see what happens

is a description of the subset of the sample space

if all possible outcome of a random experiment are included in the events

if they dont share any common outcome of a random experiment

represents the sample space for the events

of two events (A u B), is the event consisting of all simple events in A or B

the probability that event A or B occurs (the probability that a least one of these events occurs)