Multi-Event Probability
ISEE Upper Level Quantitative Reasoning · Flashcards
ISEE UPPER LEVEL QUANTITATIVE REASONING · FLASHCARDS
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QUESTION
A fair die is rolled twice. What is the probability of at least one
6
6
6
?
QUESTION
A fair die is rolled twice. What is the probability both rolls are even?
QUESTION
State the conditional probability formula for
P
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∣
B
)
P(A\mid B)
P
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∣
B
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.
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ANSWER
P
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A
∣
B
)
=
P
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A
∩
B
)
P
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B
)
P(A\mid B)=\frac{P(A\cap B)}{P(B)}
P
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A
∣
B
)
=
P
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B
)
P
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A
∩
B
)
. Conditional probability is the joint probability divided by the probability of the conditioning event.
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