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Byju's Answer
Standard IX
Mathematics
Mean
12-n, 12, 12+...
Question
12
−
n
,
12
,
12
+
n
What is the average (arithmetic mean) of the
3
quantities in the list above?
A
4
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B
12
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C
18
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D
4
+
n
3
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E
12
+
n
3
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Solution
The correct option is
E
12
Given
3
Quantities:
12
−
n
,
12
,
12
+
n
Average of the above
3
Quantities
=
Sum of the above
3
Quantities
Number of Quantities
=
12
−
n
+
12
+
12
+
n
3
=
12
×
3
3
=
12
Therefore, average of the Quantities listed above is
12
.
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0
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