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 A or B is given by P(A or B) = P(A) + P(B) - P(A and B).

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How do you calculate the probability of choosing a specific day of the week?

Back

The probability of choosing a specific day of the week is calculated by dividing the number of favorable outcomes (1) by the total number of outcomes (7).

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If a jar contains different colored marbles, how do you find the probability of selecting a marble of a certain color?

Back

To find the probability of selecting a marble of a certain color, divide the number of marbles of that color by the total number of marbles in the jar.

Front

What is the probability of choosing a girl or an A student from a class?

Back

To find this probability, use the Addition Rule: P(girl or A student) = P(girl) + P(A student) - P(girl and A student).

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How do you determine the probability of drawing a specific card from a deck?

Back

The probability of drawing a specific card is calculated by dividing the number of favorable outcomes (1 for that card) by the total number of cards in the deck (52).

Front

What is the probability of rolling a specific number on a die?

Back

The probability of rolling a specific number on a 6-sided die is 1/6, as there is one favorable outcome and six possible outcomes.

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How do you calculate the probability of two mutually exclusive events?

Back

For mutually exclusive events, the probability of either event occurring is the sum of their individual probabilities: P(A or B) = P(A) + P(B).

Front

What is the difference between independent and dependent events in probability?

Back

Independent events do not affect each other's outcomes, while dependent events do. For independent events, P(A and B) = P(A) * P(B).

Front

How do you find the probability of the union of two events?

Back

The probability of the union of two events A and B is found using the formula: P(A or B) = P(A) + P(B) - P(A and B).

Front

What is the total number of outcomes when rolling a die?

Back

The total number of outcomes when rolling a standard 6-sided die is 6.