Simple Probability

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What is the formula for calculating the probability of an event?

Back

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

Front

What is the complement of an event?

Back

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

Front

If the probability of an event is 0.3, what is the probability of its complement?

Back

The probability of the complement is 1 - 0.3 = 0.7.

Front

How do you express 3/8 as a decimal?

Back

3/8 = 0.375.

Front

What is an example of a simple probability problem?

Back

A jar contains 2 pink, 6 red, and 4 blue marbles. What is the probability of picking a red marble?

Front

What does it mean if an event is 'more likely'?

Back

An event is 'more likely' if its probability is greater than 0.5.

Front

What does it mean if an event is 'less likely'?

Back

An event is 'less likely' if its probability is less than 0.5.

Front

What is the probability of picking a blue marble from a jar with 2 pink, 6 red, and 4 blue marbles?

Back

Probability of picking a blue marble = 4/(2+6+4) = 4/12 = 1/3.

Front

What is a sample space in probability?

Back

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