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What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a number between 0 and 1, or as a fraction.

Tags

CCSS.7.SP.C.5

Front

Can a probability be greater than 1?

Back

No, a probability cannot be greater than 1. It must be between 0 (impossible event) and 1 (certain event).

Tags

CCSS.7.SP.C.5

Front

What is the sum of probabilities of all possible outcomes in a sample space?

Back

The sum of probabilities of all possible outcomes in a sample space is always equal to 1.

Tags

CCSS.7.SP.C.5

Front

How do you express a probability as a fraction?

Back

To express a probability as a fraction, divide the number of favorable outcomes by the total number of possible outcomes.

Tags

CCSS.7.SP.C.7A

Front

What is an example of a probability expressed as a fraction?

Back

If there are 3 favorable outcomes out of 10 possible outcomes, the probability is expressed as 3/10.

Tags

CCSS.7.SP.C.7B

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What does it mean if an event has a probability of 0?

Back

If an event has a probability of 0, it means that the event is impossible and will not occur.

Tags

CCSS.7.SP.C.5

Front

What does it mean if an event has a probability of 1?

Back

If an event has a probability of 1, it means that the event is certain to occur.

Tags

CCSS.7.SP.C.5

Front

Can probabilities be expressed as decimals?

Back

Yes, probabilities can be expressed as decimals, where 0 represents impossible and 1 represents certain.

Tags

CCSS.7.SP.C.5

Front

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

Back

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

Tags

CCSS.7.SP.C.7A

Front

What is the formula for calculating the probability of an event?

Back

The formula for calculating the probability of an event is P(E) = Number of favorable outcomes / Total number of possible outcomes.

Tags

CCSS.7.SP.C.7A