Probability Basics

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

What is the probability of flipping a coin and getting heads?

Back

The probability is 1/2, since there are two possible outcomes: heads or tails.

Front

If a spinner has 4 equal sections, what is the probability of landing on any one section?

Back

The probability is 1/4 for each section, as they are all equally likely.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the probability of rolling a 3 on a standard 6-sided die?

Back

The probability is 1/6, since there is one favorable outcome (rolling a 3) out of 6 possible outcomes.

Front

If you have a bag with 3 red marbles and 3 green marbles, what is the probability of picking a red marble?

Back

The probability is 1/2, since there are 3 red marbles out of a total of 6.

Front

What is an event in probability?

Back

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

Front

What is the difference between independent and dependent events?

Back

Independent events do not affect each other's outcomes, while dependent events do.