Probability - Addition Rule

Front

What is the Addition Rule in probability?

Back

The Addition Rule states that the probability of the occurrence of at least one of two events is the sum of their individual probabilities minus the probability of their intersection.

Front

If you roll one die, what is the probability of getting an odd number or a 4?

Back

2/3

Front

In a pet store, if there are 6 puppies, 4 gerbils, and 7 parakeets, what is the probability of choosing a puppy or a parakeet?

Back

13/17

Front

What is the probability of spinning green or blue if the spinner has equal sections for each color?

Back

1/2

Front

A box contains 18 blue flashlights, 3 red flashlights, 7 silver flashlights, and 2 black flashlights. What is the probability of choosing a blue or black flashlight?

Back

2/3

Front

What is the probability of rolling a 2 or a 5 on a single 6-sided die?

Back

1/3

Front

Define mutually exclusive events in probability.

Back

Mutually exclusive events are events that cannot occur at the same time. For example, when rolling a die, getting a 3 and a 5 are mutually exclusive.

Front

What is the formula for calculating the probability of two mutually exclusive events A and B?

Back

P(A or B) = P(A) + P(B) if A and B are mutually exclusive.

Front

What is the probability of drawing a heart or a spade from a standard deck of cards?

Back

1/2, since there are 26 hearts and spades out of 52 total cards.

Front

Explain the concept of independent events in probability.

Back

Independent events are events where the occurrence of one event does not affect the occurrence of another. For example, flipping a coin and rolling a die are independent events.