Transcript Document

Algebra 2 - Chapter 10: Day 5 (10.3)
Probability
If you pick one card from a deck of 52, what is
the probability it is an 8?
If you pick one card from a deck of 52, what are the
odds it is an 8?
If you pick a card from a deck of 52…
a) What is the probability it is a red king?
b) What are the odds it is a black face card?
Our company is producing 5 new cereals: wheat,
rice, corn, oat, and multigrain, all with different
prices.
a) What is the probability that if you randomly
select the order they are introduced, that you
introduce them in the order of their prices?
b) What is the probability that the first
introduced cereal is the multigrain one?
Notice the difference in the 2 denominators.
Rolling dice (two dice or one die) …
If you roll one die
a) What are the odds of getting a six?
1:5
b) What are the odds against a six?
5:1
• If the odds in favor of something is a:b,
then the odds against it is b:a.
Experimental Probability
If you toss a coin 100 times, will you always get exactly
50 heads?
Experimental probability states that you actually take time
to do an experiment and base your probability on that
experiment.
You roll a die 100 times and your results are…
1 2 3 4 5 6
15 17 20 13 10 25
What is the probability that the next roll of the die is a
4?
The blood types for sample of donors at a blood drive
are displayed in the bar graph. Find the experimental
probability that a randomly selected blood donor
would have blood type O.
Find the probability that a dart thrown at the
rectangular board hits one of the triangles. Assume
that the dart is equally likely to hit any point inside
the board.
40 in
5 in
3 in
4 in
3 in
8 in
4 in
10 in
Recap:
Experimental Probability – the probability is based
on the results of an experiment