Multi-Event Probability
ISEE Upper Level Quantitative Reasoning · Flashcards · Recall
ISEE UPPER LEVEL QUANTITATIVE REASONING · FLASHCARDS
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QUESTION
State the addition rule for mutually exclusive events
A
A
A
and
B
B
B
.
QUESTION
State De Morgan's law for the complement of a union:
(
A
∪
B
)
c
(A\cup B)^c
(
A
∪
B
)
c
.
QUESTION
State the conditional probability formula for
P
(
A
∣
B
)
P(A\mid B)
P
(
A
∣
B
)
.
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ANSWER
P
(
A
∣
B
)
=
P
(
A
∩
B
)
P
(
B
)
P(A\mid B)=\frac{P(A\cap B)}{P(B)}
P
(
A
∣
B
)
=
P
(
B
)
P
(
A
∩
B
)
. Conditional probability is the joint probability divided by the probability of the conditioning event.
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