Basic Probability

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 P(A) represent?

Back

P(A) represents the probability of event A occurring.

Front

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

Back

The formula is P(A) = Number of favorable outcomes / Total number of outcomes.

Front

What is the probability of an event that cannot happen?

Back

The probability is 0.

Front

What is the probability of an event that is certain to happen?

Back

The probability is 1.

Front

How do you calculate P(not A)?

Back

P(not A) = 1 - P(A).

Front

If a spinner has 8 equal sections, what is the probability of landing on one specific section?

Back

The probability is 1/8.

Front

How do you convert a decimal to a percent?

Back

Multiply the decimal by 100 and add a percent sign.

Front

What is the probability of choosing a letter from the word 'ALGEBRA' that is not 'A'?

Back

There are 5 letters that are not 'A' out of 7 total letters, so the probability is 5/7.

Front

In a bag with 3 red, 2 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

The probability is 2/10 or 1/5.