Probability Flashcards
What is probability?
Probability is a measure of how likely an event is to occur.
What is the probability of an event that is certain to happen?
1 or 100%.
What is the probability of an impossible event?
0 or 0%.
Fill in the blank: The sum of the probabilities of all possible outcomes in a probability experiment is _____.
1.
True or False: The probability of rolling a 3 on a standard six-sided die is 1/6.
True.
If a bag contains 3 red balls and 2 blue balls, what is the probability of drawing a red ball?
3/5.
What is an experiment in probability?
An action or process that leads to one or more outcomes.
What is a sample space?
The set of all possible outcomes of a probability experiment.
Multiple Choice: Which of the following is an example of a random event? A) Flipping a coin B) Predicting the weather C) Solving a math problem
A) Flipping a coin.
What does the term ‘outcome’ refer to in probability?
A possible result of a probability experiment.
Fill in the blank: The probability of an event A is denoted as P(A) and can be calculated using the formula: P(A) = _____.
Number of favorable outcomes / Total number of outcomes.
True or False: Events that cannot happen at the same time are called mutually exclusive events.
True.
What is the probability of drawing a heart from a standard deck of cards?
1/4.
If an event has a probability of 0.25, what is the likelihood of it not occurring?
0.75 or 75%.
Multiple Choice: What is the probability of flipping a coin and getting tails? A) 1/3 B) 1/2 C) 1/4
B) 1/2.
What is a complementary event?
The event of an outcome not occurring.
Fill in the blank: The probability of event A occurring and event B occurring together is called the _____.
joint probability.
What is an independent event?
An event whose outcome does not affect the outcome of another event.
If two dice are rolled, what is the total number of possible outcomes?
36.
True or False: The more times an event occurs, the more likely it is to have a probability of 1.
False.
What is the formula for calculating the probability of independent events A and B occurring together?
P(A and B) = P(A) * P(B).
Multiple Choice: What is the probability of drawing a spade from a standard deck of cards? A) 1/2 B) 1/4 C) 1/13
B) 1/4.
What is the term used for the likelihood of an event happening in a given situation?
Probability.
Fill in the blank: The probability of rolling an even number on a six-sided die is _____.
1/2.
What is a dependent event?
An event whose outcome is affected by the outcome of another event.
True or False: The probability of an event is always between 0 and 1.
True.
