VOCAB
An event with only one outcome.
If there are 3 blue marbles and 7 green marbles in a bag. What is the probability of randomly pulling out a green marble?
7/10
Probability Experiment: You roll two ten sided dice.
Event A: The first die is greater than 5.
Event B: The second die is an odd number.
Are these events independent? Why or why not?
Independent because the outcome of the first die does not affect the outcome of the second die.
You roll a die twice. What is the probability that the first die is even and the second die is a 5?
Use the two-way table.
What is the probability of a randomly selected person being a constable and male?
56/100
Two events that cannot happen at the same time.
What is the probability of rolling an even number on a six sided die?
You roll a ten sided die.
Are the events "rolling a number greater than 4" and "rolling a number less than 7" mutually exclusive?
You flip a coin and roll a 6 sided die.
What is the probability that you will get "heads" and a number greater than 2?
Use the two way table.
What is the probability of a randomly selected person being a constable or male?
90/100
When the outcome of one event does not change the outcome of the other event.
What is the probability of rolling a 3 on a six sided die?
Event K is flipping "tails" on a fair coin.
Is event K a simple event?
You choose 2 marbles from a bag of 10 marbles with replacement. There are 4 blue marbles, 3 red marbles, and 3 green marbles.
What is the probability that both marbles are blue?
4/10 * 4/10 = 16/100 = 0.16
Use the two way table.
What is the probability of a randomly selected person not being a constable?
All of the outcomes not in the event.
What is the probability of not rolling a 5 on a six sided die?
A: {1, 2, 3, 4, 5, 6, 7}
B: {3, 6, 9, 12}
What are the outcomes of A U B?
{1, 2, 3, 4, 5, 6, 7, 9, 12}
You select two marbles from a bag of ten marbles without replacement. There are 4 blue marbles, 3 green marbles, and 3 red marbles.
What is the probability that both marbles are blue?
4/10 * 3/9 = 12/90 = 0.13
Use the two way table.
What is the probability that a randomly selected person is a female or a chief inspector?
34/100
The set of all outcomes in a probability experiment.
Hannah has a 87% chance of passing her math test. What is the probability that Hannah does not pass her math test?
A: {2, 4, 6, 8, 10}
B: {1, 2, 4, 8, 16}
What are the outcomes in the event (A and B)
You select two marbles from a bag of ten marbles without replacement. There are 4 blue marbles, 3 green marbles, and 3 red marbles.
What is the probability that the first marble is red and the second marble is not red?
3/10 * 7/9 = 21/90 = 0.23
Use the two way table.
What is the probability that a randomly selected person is an inspector, given that they are female?
4/33