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Standard VII
Mathematics
Arithmetic Mean and Range
Question
Find the mean of first
n
natural numbers.
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Solution
Verified by Toppr
First n natural numberss are
=
1
,
2
,
3....
n
Mean
=
sum of observations
taotal observation
⇒
Mean
=
1
+
2
+
3
+
.
.
.
.
.
+
n
n
=
n
(
n
+
1
)
2
n
=
n
+
1
2
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n
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. Find
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