Probability - Addition Rule

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What is the Addition Rule in probability?

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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?

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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 spinner has 4 equal sectors, what is the probability of landing on one of two colors?

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The probability of landing on one of two colors is the sum of the probabilities of landing on each color, which is the number of favorable outcomes divided by the total number of outcomes.

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How do you find the probability of selecting a marble of a certain color from a jar?

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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.

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

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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 total number of outcomes when rolling a die?

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The total number of outcomes when rolling a die is 6, as there are 6 faces on a standard die.

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What is the probability of choosing an even number from 1 to 10?

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The probability of choosing an even number from 1 to 10 is the number of even numbers (5) divided by the total numbers (10), which is 1/2.

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How do you calculate the probability of two independent events occurring?

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For two independent events A and B, the probability of both occurring is P(A and B) = P(A) * P(B).

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What is the significance of the term 'favorable outcomes' in probability?

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Favorable outcomes refer to the outcomes that satisfy the condition of the event for which the probability is being calculated.

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How do you express the probability of an event as a fraction?

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The probability of an event can be expressed as a fraction by taking the number of favorable outcomes and dividing it by the total number of possible outcomes.