Complement Probability

Front

What is the definition of Complement Probability?

Back

Complement Probability refers to the probability of an event not occurring. It is calculated as 1 minus the probability of the event occurring.

Front

If the probability of an event A is P(A) = 0.3, what is the complement of A?

Back

P(NOT A) = 1 - P(A) = 1 - 0.3 = 0.7.

Front

What is the formula to calculate the complement of an event?

Back

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

Front

In a box with 6 red pens, 8 black pens, 2 blue pens, and 4 purple pens, what is the probability of NOT choosing a red pen?

Back

P(NOT red) = 1 - P(red) = 1 - (6/20) = 14/20 = 7/10.

Front

How many total pens are in the box with 6 red, 8 black, 2 blue, and 4 purple pens?

Back

Total pens = 6 + 8 + 2 + 4 = 20 pens.

Front

What is the probability of rolling a number other than 1 on a regular die?

Back

P(NOT 1) = 1 - P(1) = 1 - (1/6) = 5/6.

Front

If there are 8 red marbles in a jar of 15, what is the probability of choosing a red marble?

Back

P(red) = 8/15.

Front

What is the complement of choosing a red marble if there are 8 red marbles in a jar of 15?

Back

P(NOT red) = 1 - P(red) = 1 - (8/15) = 7/15.

Front

What is the probability of NOT rolling a 1 on a die?

Back

P(NOT 1) = 5/6.

Front

If the probability of an event is 0.25, what is the probability of its complement?

Back

P(NOT A) = 1 - 0.25 = 0.75.