Probability

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 1 mean?

Back

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

Front

What does a probability of 0 mean?

Back

A probability of 0 means that the event is impossible and will not happen.

Front

What is the probability of an event that is equally likely to happen?

Back

The probability of an event that is equally likely to happen is 0.5 or 50%.

Front

If the probability of an event is 30%, what is the probability that it will not happen?

Back

The probability that it will not happen is 70%.

Front

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

Back

The probability of flipping a coin and getting tails is 1/2.

Front

How do you calculate the probability of an event?

Back

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

Front

In a jar with 10 green marbles, 7 red marbles, and 3 blue marbles, what is the probability of pulling a red marble?

Back

The probability of pulling a red marble is 7/20.

Front

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

Back

It means that the probability of the event happening is greater than 0.5.

Front

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

Back

It means that the probability of the event happening is less than 0.5.