Addition & Multiplication Rule of Probability

Front

What is the Addition Rule of Probability?

Back

The Addition Rule of Probability 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. Formula: P(A or B) = P(A) + P(B) - P(A and B).

Front

What is the Multiplication Rule of Probability?

Back

The Multiplication Rule of Probability states that the probability of the occurrence of two independent events is the product of their individual probabilities. Formula: P(A and B) = P(A) * P(B).

Front

If a day of the week is chosen at random, what is the probability of choosing a Monday or Tuesday?

Back

2/7

Front

In a pet store, if there are 6 puppies, 9 kittens, 4 gerbils, and 7 parakeets, what is the probability of choosing a puppy or a parakeet?

Back

1/2

Front

If you toss two coins, what is the probability of getting 2 heads?

Back

1/4

Front

In a jar with 5 yellow gums and 7 green gums, what is the probability of getting 2 yellow gums without replacement?

Back

5/33

Front

Define 'Independent Events' in probability.

Back

Independent events are two or more events where the occurrence of one event does not affect the occurrence of the other. For example, tossing a coin and rolling a die are independent events.

Front

Define 'Dependent Events' in probability.

Back

Dependent events are two or more events where the occurrence of one event affects the occurrence of the other. For example, drawing cards from a deck without replacement.

Front

What is the probability of rolling a sum of 7 with two dice?

Back

The probability is 1/6.

Front

What is the probability of drawing an Ace from a standard deck of cards?

Back

The probability is 4/52 or 1/13.