PS_Video Lesson 5.1.2 Addition Rule for Probability

What is the primary purpose of the Addition Rule of Probability?

• To calculate the probability of two events occurring simultaneously.

• To determine the probability of at least one of multiple criteria being true.

• To find the probability of an event not happening.

• To compare the probabilities of independent events.

If two events are mutually exclusive, what is the relationship between them?

• They must both occur for the outcome to be valid.

• They can occur at the same time, but only rarely.

• They cannot both occur simultaneously.

• The probability of one event affects the probability of the other.

When calculating the probability of drawing a heart OR a face card from a standard deck, why is it necessary to subtract the probability of drawing a heart AND a face card?

• To account for cards that are neither hearts nor face cards.

• To avoid double-counting cards that are both hearts and face cards.

• To simplify the calculation for easier understanding.

• To ensure the total probability does not exceed 1.

In a group of students, 50% play soccer, 20% play tennis, and 10% play both. What is the probability that a randomly selected student plays at least one of these sports?

• 70%

• 80%

• 60%

• 50%