Calculating Averages
ISEE Middle Level · Flashcards · Application
ISEE MIDDLE LEVEL · FLASHCARDS
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QUESTION
What is the weighted mean of
80
80
80
(weight
2
2
2
) and
90
90
90
(weight
3
3
3
)?
QUESTION
What is the mean of the data set
−
3
,
−
1
,
2
,
6
-3, -1, 2, 6
−
3
,
−
1
,
2
,
6
?
QUESTION
The mean of
5
5
5
numbers is
6
6
6
. Four numbers are
4
,
5
,
7
,
8
4, 5, 7, 8
4
,
5
,
7
,
8
. What is the fifth number?
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ANSWER
6
6
6
. Total sum is
6
×
5
=
30
6 \times 5 = 30
6
×
5
=
30
; subtract sum of known numbers
4
+
5
+
7
+
8
=
24
4+5+7+8=24
4
+
5
+
7
+
8
=
24
to find the fifth.
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