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Question
Mathematics
Find the arithmetic mean of the observations x+5, x+6, x+10, x+11, x+14, x+20 (where x is any real number).
Q. Find the arithmetic mean of the observations
x
+
5
,
x
+
6
,
x
+
10
,
x
+
11
,
x
+
14
,
x
+
20
(where
x
is any real number).
45
139
Statistics
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A
x
+
11
B
x
+
5
C
x
+
13
D
x
+
7
Solution:
A
M
=
Total number of observations
Sum of all observations
=
6
x
+
5
+
x
+
6
+
x
+
10
+
x
+
11
+
x
+
14
+
x
+
20
=
6
6
x
+
66
=
6
6
(
x
+
11
)
=
x
+
11