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Byju's Answer
Standard VII
Mathematics
Mean
Dataset :- 3,...
Question
Dataset :-
3
,
5
,
6
,
7
,
x
,
3
,
4
Mean of the data set is given as 5. What is the value of
x
?
7
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Solution
The correct option is
A
7
Dataset :-
3
,
5
,
6
,
7
,
x
,
3
,
4
Sum of the observations in the dataset
=
3
+
5
+
6
+
7
+
x
+
3
+
4
=
x
+
28
Mean =
Sum of Observations
Number of Observations
⇒
5
=
x
+
28
7
⇒
35
−
28
=
x
⇒
x
=
7
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