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Byju's Answer
Standard XII
Mathematics
Probability Distribution
If the mean o...
Question
If the mean of the binomial distribution is
25
. Then standard deviation lies in the interval
A
[
0
,
5
)
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B
(
0
,
5
]
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C
[
0
,
25
)
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D
(
0
,
25
]
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Solution
The correct option is
A
[
0
,
5
)
Given, mean of binomial distribution
μ
=
n
p
=
25
We have ,Variance
=
σ
2
=
n
p
q
Now,
0
≤
p
<
1
and
0
≤
q
≤
1
⇒
0
≤
n
p
q
≤
n
p
⇒
0
≤
σ
2
≤
25
⇒
−
5
≤
σ
≤
5
But
σ
≥
0
∴
0
≤
σ
<
5
σ
∈
[
0
,
5
)
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0
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