Definitions
Probability
Random
Fractions
Complement
100
If the occurrence of one event does not affect the probability of the other.
What is an independent event?
100
Two tosses: Heads being chosen and tails being chosen (fraction or percentage)
1/4 or 25%
100
There are 18 students in a class of 33 that wear glasses. What is the probability that a student in the class does not wear glasses? (percentage rounded)
1 - 18/33 = 15/33 or 45%
100
On a 6-sided number cube, labeled 1-6, what is the probability of rolling a 2? Show me in a fraction.
1/6
100
It snowed three days last week. P (no snow). Leave in fraction form.
1-3/7 = 4/7
200
Found by adding the joint relative frequency of each row and column.
What is marginal relative frequency?
200
A number cube is thrown. 3 chosen and 4 chosen (fraction)
1/36
200
Of 149 people, 54 people are reading and 67 people are writing. There were 28 people who only read. What is the probability that someone is reading or writing? (percentage rounded)
54/149 + 67/149 - 26/149 = 95/149 or 64%
200
What is the probability of rolling an even number on a 6 sided cube labeled with the numbers: 1, 3, 5, 7, 9, 11? Show me in a fraction.
0/6
200
Your ten digit phone number has one 3 in it; P(not a 3). Leave in fraction form.
1 - 1/10 = 9/10
300
An event made up of two or more simple events.
What is a compound event?
300
A number cube is thrown. 2 chosen or 5 chosen (fraction or percentage)
1/3 or 33%
300
Create a two-way frequency table with vertical categories (black, blue, brown) and two horizontal categories (shoes and belts), find P(brown | shoe). Black shoes 5, black belts 8; blue shoes 4, blue belts 2; brown shoes 3, brown belts 4. Leave answer as a fraction
3/12 = 1/4
300
What is the probability that a 12-sided number cube will land with an odd number up, if the cube is labeled with the numbers 1-12 on it? Show me as a simplified fraction.
1/2
300
You had homework in 2 out of 7 classes. P(no-HW). Leave in fraction form.
1-2/7 = 5/7
400
The measure of how likely an event is to occur.
What is Probability?
400
Two number cubes are thrown. 4 chosen or 6 chosen (fraction)
1/18
400
Using a number cube, what is the probability of rolling a 3 or an odd number? (fraction)
1/6 + 3/6 - 1/6 = 1/2
400
There are 22 students in my homeroom. 10 of them are boys. If I were to pick a popsicle stick, what is the probability, in fraction form, that I would pick a girl?
12/22 or 6/11
400
A jar with 13 marbles, 2 are red, 1 green, the rest blue. P (not blue). Leave in fraction form.
1 - 10/13 = 3/13
500
Set of all possible outcomes.
What is the sample space?
500
On a nine-space spinner with two yellows, four blues, and three reds: what is the probability of spinning blue and then spinning red (fraction)
12/81 or 4/27
500
Create a two-way frequency table to find P(belts | black). Horizontal categories are shoes and belts. Vertical categories are black, blue, and brown. Black shoes 5, black belts 8; blue shoes 4, blue belts 2; brown shoes 3, brown belts 4. Leave answer as a fraction
8/13
500
If 100 of the tenth grade students passed Mrs. Foote's class and a random selection was made by a counselor. What is the probability that the student would have Mrs. Newborn's class next year? (Fraction form).
1/100
500
Picking an ace out of a regular deck of 52 cards. P (not ace). Leave in fraction form.
1 - 4/52 = 48/52 or 12/13
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