Simple 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 and 1.

Front

What is the theoretical probability of an event?

Back

Theoretical probability is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Front

If a bag contains 3 red marbles, 2 blue marbles, 4 green marbles, and 1 yellow marble, what is the total number of marbles?

Back

10 marbles.

Front

What is the probability of pulling a red or yellow marble from the bag?

Back

4/10 or 2/5.

Front

What is the probability of choosing a solid black or solid white marble if there are 3 black and 2 white marbles in a bag of 10 marbles?

Back

5/10 or 1/2.

Front

When rolling a die, what is the probability of rolling a number less than 3?

Back

1/3.

Front

What is the range of probability values?

Back

Probability values range from 0 (impossible event) to 1 (certain event).

Front

What is the probability of drawing a red 2 or a black 7 from a standard deck of cards?

Back

4/52 or 1/13.

Front

How do you calculate the probability of multiple independent events occurring?

Back

Multiply the probabilities of each individual event.

Front

What is an example of a certain event in probability?

Back

Flipping a coin and getting either heads or tails.