Simple Probability & Complement

Front

What is probability?

Back

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

Front

What does P(even) represent?

Back

P(even) represents the probability of selecting an even number from a set of numbers.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the complement of an event?

Back

The complement of an event A, denoted as NOT A, is the event that A does not occur.

Front

If P(A) = 2/7, what is P(NOT A)?

Back

P(NOT A) = 1 - P(A) = 1 - 2/7 = 5/7.

Front

What is P(solid)?

Back

P(solid) is the probability of selecting a solid object from a group of objects.

Front

If there are 5 objects and 3 are solid, what is P(solid)?

Back

P(solid) = 3/5.

Front

What does P(NOT solid) represent?

Back

P(NOT solid) represents the probability of selecting an object that is not solid.

Front

If P(solid) = 3/5, what is P(NOT solid)?

Back

P(NOT solid) = 1 - P(solid) = 1 - 3/5 = 2/5.

Front

What is P(4 legs)?

Back

P(4 legs) is the probability of selecting an object that has 4 legs.