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Byju's Answer
Standard X
Mathematics
Addition Theorem of Probability for 2 Events
The probabili...
Question
The probability of happening of an event
A
is
0.5
and that of
B
is
0.3
. If
A
and
B
are mutually exclusive events, then find the probability of happening of neither
A
nor
B
.
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Solution
P
(
¯
A
∩
¯
B
)
=
1
−
P
(
A
∪
B
)
Since
A
and
B
are mutually exclusive, so
P
(
A
∪
B
)
=
P
(
A
)
+
P
(
B
)
Hence, required probability
=
1
−
(
0.5
+
0.3
)
=
0.2
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