Reading 8: Probability Concepts-LOS d习题精选 center, border, between, 2010

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Session 2: Quantitative Methods: Basic Concepts
Reading 8: Probability Concepts

LOS d: Distinguish between unconditional and conditional probabilities.

 

 

 

Let A and B be two mutually exclusive events with P(A) = 0.40 and P(B) = 0.20. Therefore:

A) P(B|A) = 0.20.

B) P(A and B) = 0.

C) P(A and B) = 0.08.

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Let A and B be two mutually exclusive events with P(A) = 0.40 and P(B) = 0.20. Therefore:

A) P(B|A) = 0.20.

B) P(A and B) = 0.

C) P(A and B) = 0.08.

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If the two evens are mutually exclusive, the probability of both ocurring is zero.

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For a given corporation, which of the following is an example of a conditional probability? The probability the corporation's:

A) dividend increases given its earnings increase.

B) earnings increase and dividend increases.

C) inventory improves.

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For a given corporation, which of the following is an example of a conditional probability? The probability the corporation's:

A) dividend increases given its earnings increase.

B) earnings increase and dividend increases.

C) inventory improves.

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A conditional probability involves two events. One of the events is a given, and the probability of the other event depends upon that given.

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For an unconditional probability:

A) there are at least two events.

B) the addition rule is important.

C) there is only one random variable of concern.

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For an unconditional probability:

A) there are at least two events.

B) the addition rule is important.

C) there is only one random variable of concern.

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An unconditional probability gives the probability of an event regardless of what other events occur

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