Probability Flashcards
(26 cards)
What is probability?
Probability is the measure of the likelihood that an event will occur.
What is the probability of rolling a 3 on a standard six-sided die?
The probability is 1/6.
True or False: The probability of an impossible event is 1.
False.
What is the range of probability values?
The range is from 0 to 1.
Fill in the blank: The probability of an event that is certain to happen is ____.
1
If you flip a coin, what is the probability of getting heads?
1/2
What is the formula for calculating probability?
Probability = Number of favorable outcomes / Total number of outcomes
True or False: If two events are independent, the occurrence of one does not affect the other.
True.
What is the probability of drawing a red card from a standard deck of 52 cards?
26/52 or 1/2.
What does it mean if an event has a probability of 0?
It means the event is impossible.
Multiple Choice: Which of the following has a probability of 0? A) Rolling a 1 on a die B) Drawing a king from a standard deck of cards C) Rolling a 7 on a 6-sided die D) Flipping a coin
C) Rolling a 7 on a 6-sided die
What is a sample space?
A sample space is the set of all possible outcomes of an experiment.
Fill in the blank: The probability of an event that cannot happen is ____.
0
What is a favorable outcome?
A favorable outcome is an outcome that is considered a success for the event in question.
Multiple Choice: What is the probability of rolling an even number on a six-sided die? A) 1/2 B) 1/3 C) 1/6 D) 2/3
A) 1/2
True or False: The sum of probabilities of all possible outcomes in a sample space is 1.
True.
What is the probability of picking a blue marble from a bag containing 3 blue, 2 red, and 5 green marbles?
3/10
Fill in the blank: The probability of an event is expressed as a fraction, decimal, or ____.
percentage
What do we call the likelihood of an event happening?
Probability
Multiple Choice: If you have a spinner divided into 4 equal sections labeled 1, 2, 3, and 4, what is the probability of landing on a number greater than 2? A) 1/4 B) 1/2 C) 3/4 D) 1
B) 1/2
What is the probability of not rolling a 5 on a six-sided die?
5/6
True or False: The probability of a certain event is always less than 1.
False.
What is a complementary event?
A complementary event is the event of not having the event occur.
Fill in the blank: The sum of the probabilities of an event and its complementary event equals ____.
1
