Probability Review

Front

What is Probability?

Back

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

Front

What does a probability of 0 mean?

Back

A probability of 0 means that the event cannot happen.

Front

What does a probability of 1 mean?

Back

A probability of 1 means that the event is certain to happen.

Front

If you flip a fair coin, what is the probability of getting heads?

Back

The probability of getting heads is 1/2.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

The probability of rolling a 3 is 1/6.

Front

What is an event in probability?

Back

An event is a specific outcome or a set of outcomes of a random experiment.

Front

What is the sample space in probability?

Back

The sample space is the set of all possible outcomes of a random experiment.

Front

If you have a bag with 4 red balls and 6 blue balls, what is the probability of picking a red ball?

Back

The probability of picking a red ball is 4/10 or 2/5.

Front

What is a complementary event?

Back

A complementary event is the event that represents all outcomes not included in the event of interest.

Front

If the probability of rain tomorrow is 0.3, what is the probability that it will not rain?

Back

The probability that it will not rain is 1 - 0.3 = 0.7.