2. What is PROBABILITY ???
DEFINITION
Probability is the likelihood that an action will occur and is
calculated by dividing the number of favorable results by
the total number of possible results, we use probability in
daily life to make our decision when we aren't sure about
what the outcome will be.
7. THEORETICAL PROBABILITY
EXAMPLE
A letter is selected at random from the word
WATCHING.
a. State the number of possible outcomes?
=8
b. What is the probability of selecting a T?
Pr(T) = 1/8
c. What is the probability of selecting a vowel?
Pr(T) = 2/8
= 1/4
9. AXIOMATIC PROBABILITY
The objective of probability is to assign to each event A a
number P(A), called the probability of the event A, which
will give a precise measure of the chance thtat A will occur.