Simple Probability and Their 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 is the complement of an event?

Back

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

Front

If a box has 10 items, and 3 are red, what is P(red)?

Back

P(red) = 3/10.

Front

How do you calculate P(NOT A)?

Back

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

Front

In a box with 5 green and 5 blue marbles, what is P(NOT green)?

Back

P(NOT green) = 5/10 or 1/2.

Front

If there are 4 red and 6 blue pens, what is P(red or blue)?

Back

P(red or blue) = 10/10 or 1.

Front

What is the probability of drawing a non-blue item from a box with 3 blue and 7 yellow items?

Back

P(NOT blue) = 7/10.

Front

If a bag contains 2 apples and 3 bananas, what is P(banana)?

Back

P(banana) = 3/5.

Front

What is the probability of NOT rolling a 3 on a six-sided die?

Back

P(NOT 3) = 5/6.

Front

If a box has 3 lime, 5 grape, and 2 orange popsicles, what is P(lime)?

Back

P(lime) = 3/10.