7th Grade Math = Probability Flashcard

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 a probability of 0 mean?

Back

A probability of 0 means that the event will not occur.

Front

What does a probability of 1 mean?

Back

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

Front

What is a favorable outcome in probability?

Back

A favorable outcome is an outcome that is considered successful or desired in a probability experiment.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the probability of spinning an even number on a spinner with numbers 1 to 6?

Back

P(even) = 3/6 = 1/2, since the even numbers are 2, 4, and 6.

Front

If a spinner has numbers 1 to 6, how many total outcomes are there?

Back

There are 6 total outcomes when spinning the spinner.

Front

What is the probability of spinning a number less than 7 on a spinner with numbers 1 to 6?

Back

P(less than 7) = 1, since all outcomes (1, 2, 3, 4, 5, 6) are less than 7.

Front

What does it mean if the probability of an event is 50/50?

Back

It means that the event is equally likely to occur or not occur.

Front

What is the probability of spinning a 5 on a spinner with numbers 1 to 6?

Back

P(5) = 1/6, since there is one favorable outcome (5) out of six possible outcomes.