Probability
PSAT Math · Flashcards · Application
PSAT MATH · FLASHCARDS
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QUESTION
What is the probability of a union if
P
(
A
)
=
0.3
P(A)=0.3
P
(
A
)
=
0.3
,
P
(
B
)
=
0.5
P(B)=0.5
P
(
B
)
=
0.5
, and
P
(
A
∩
B
)
=
0.1
P(A\cap B)=0.1
P
(
A
∩
B
)
=
0.1
?
QUESTION
Find
P
(
A
∩
B
)
P(A\cap B)
P
(
A
∩
B
)
if
A
A
A
and
B
B
B
are independent,
P
(
A
)
=
0.3
P(A)=0.3
P
(
A
)
=
0.3
, and
P
(
B
)
=
0.4
P(B)=0.4
P
(
B
)
=
0.4
.
QUESTION
A bag has
3
3
3
red and
2
2
2
blue marbles. What is
P
(
red
)
P(\text{red})
P
(
red
)
in one draw?
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ANSWER
3
5
\frac{3}{5}
5
3
. Three red marbles out of five total marbles.
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