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Standard XII
Mathematics
Fundamental Principle of Counting
Consider the ...
Question
Consider the two random experiments. Tossing a fair coin once
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Solution
Tossing a coin
(
S
)
=
{
H
,
T
}
∴
n
(
S
)
=
2
Elementary events are,
E
1
=
{
H
}
,
E
2
=
{
T
}
∴
P
(
E
1
)
=
1
2
P
(
E
2
)
=
1
2
By adding
P
(
E
1
)
and
P
(
E
2
)
, we get
P
(
E
1
)
+
P
(
E
2
)
=
1
2
+
1
2
=
1
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