College Prep Math: TSI Practice

Front

What is the definition of probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

How do you calculate the probability of an event?

Back

Probability of an event = (Number of favorable outcomes) / (Total number of outcomes).

Front

What is a sample space in probability?

Back

A sample space is the set of all possible outcomes of a probability experiment.

Front

Define a random variable.

Back

A random variable is a variable whose possible values are numerical outcomes of a random phenomenon.

Front

What is the difference between discrete and continuous random variables?

Back

Discrete random variables can take on a countable number of values, while continuous random variables can take on an infinite number of values within a given range.

Front

What is the formula for finding the mean of a probability distribution?

Back

Mean (μ) = Σ [x * P(x)], where x is a value and P(x) is the probability of x.

Front

What does it mean for events to be independent?

Back

Two events are independent if the occurrence of one does not affect the probability of the other.

Front

What is the complement of an event?

Back

The complement of an event A is the event that A does not occur, denoted as A'. The probability of the complement is P(A') = 1 - P(A).

Front

How do you find the probability of the union of two events?

Back

P(A or B) = P(A) + P(B) - P(A and B).

Front

What is a probability distribution?

Back

A probability distribution describes how the probabilities are distributed over the values of the random variable.