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Byju's Answer
Standard IX
Mathematics
Properties of Measures of Central Tendency
Attempt the m...
Question
Attempt the missing value of the variate for the following distributed whose mean is
31.87
.
x
12
20
27
33
−
54
f
8
16
48
90
30
8
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Solution
⇒
Let missing variate be
x
1
.
x
f
f
x
12
8
96
20
16
320
27
48
1296
33
90
2970
x
1
30
30
x
1
54
8
432
∑
f
=
200
∑
f
x
=
5114
+
30
x
1
⇒
M
e
a
n
=
∑
f
x
∑
f
⇒
31.87
=
5114
+
30
x
1
200
⇒
6374
=
5114
+
30
x
1
⇒
1260
=
30
x
1
∴
x
1
=
42
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