Recent Vocabulary
Event A does not affect Event B.
What is an independent event?
Rolling a die two separate times is an example of this.
What is an example of an independent event?
If the odds in favor of an event are 1:3, what is the probability of the event?
1/4
What is the first question you should ask yourself to decide what type of problem you're working with?
Ask yourself, "Are repeats allowed?"
This is also called numerical data.
What is quantitative data also called?
Drawing 2 cards randomly from a deck without replacement is an example of this.
What is an example of a dependent event?
If the probability of an event happening is 2/5, what are the odds of the event happening?
2:3
Which type(s) of problems allow repeats?
Only Fundamental Counting Rule problems
Event B is affected by Event A.
What is a dependent event?
In a shipment of 30 apples, 5 are bruised. If 2 are randomly selected, what is the probability that the first one is bruised and that the second one is not?
(5/30) X (25/29) = (125/870) = (25/174)
If the probability of an event not happening is 4/5, what are the odds of the event happening?
1:4
What is the second question you should ask yourself to figure out what type of problem you're working with?
Ask yourself, "Does order matter?"
This is also called categorical data.
What is qualitative data also called?
If a die is rolled four times, what is the probability of getting four 5s?
1/6 X 1/6 X 1/6 X 1/6 = 1/1296
If the odds of an event happening is 8:11, what is the probability of the event not happening?
11/19
A: If repeats aren't allowed and order matters, what type of problem are you working with?
B:If repeats aren't allowed and order doesn't matter, what type of problem are you working with?
A: A permutation problem
B: A combination problem