Download Chapter 4 - morgansmathmarvels

Chapter 4
Elementary Probability
Theory
4.1 Notes
• Probability – the ___________ of an event
happening (between __ and __).
• How to find probabilities
– Intuition – __________________________
– Relative frequency – ___________________
__________. Relative frequency =
– Theoretical/Formula – probability that should
occur if ___________________________.
When outcomes are equally likely, then
Probability =
e.g. If you are guessing on a multiple choice
question that has 4 responses, the probability
of getting the question right is
P=
Sample Space is the set of all possible
outcomes.
e.g. If you toss a coin, the sample space is
Ex. 1 Human eye color is controlled by a single pair of
genes (one from each parent). Brown eyed color, B,
is dominant over blue eyed color, b. Therefore if a
person has Bb, then the brown dominates and they
have brown eyes.
Mother
Father
B
b
B
BB
Bb
b
Bb
bb
If both parent have Bb, what is the probability their
child will have blue eyes?
What is the probability the child will have brown
eyes?
P(A) =
P(AC) =
P(event) must be between __ and __
inclusively.
The closer a probability is to __, the better
chance it has of happening.
The sum of the probabilities of a sample
space must equal __.
The probability that an event occurs plus the
probability that the event does not occur = __.
Assignment
• Day 1 P. 130 #1-5 odd, 9, 10, 12, 15
• Day 2 P. 130 #2-6 even, 11, 13 skip a, 14