Basic 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 does it mean if an event is independent?

Back

An event is independent if the outcome of one event does not affect the outcome of another event.

Front

What is the theoretical probability formula?

Back

Theoretical Probability = (Number of favorable outcomes) / (Total number of outcomes)

Front

If a bag contains 3 red marbles, 2 blue marbles, and 4 yellow marbles, what is the total number of marbles?

Back

Total marbles = 3 + 2 + 4 = 9.

Front

What is the probability of spinning a green section on a spinner divided into 4 equal parts with one green?

Back

Probability = 1/4.

Front

If you flip a coin 10 times, how many heads do you expect to get?

Back

You expect to get about 5 heads.

Front

What is the probability of picking a black or white marble from a bag containing 3 black, 2 white, and 5 red marbles?

Back

Probability = (3 black + 2 white) / (Total marbles) = 5/10 = 1/2.

Front

What is a dependent event?

Back

A dependent event is one where the outcome of one event affects the outcome of another event.

Front

What is the probability of drawing a red marble from a bag with 3 red, 2 blue, and 4 yellow marbles?

Back

Probability = 3/9 = 1/3.

Front

What is the probability of rolling a 4 on a standard six-sided die?

Back

Probability = 1/6.