Mean with Value Missing (Level 5)

This math topic focuses on advanced problems related to calculating the mean of a set when a value is missing. Practicing skills include determining what number should replace the missing value (denoted as '?') in a series to achieve the specified average. Each problem provides a series of numbers with one value missing and a stated mean. Students must use their understanding of mean calculation to find the correct missing number from multiple choices provided. This involves multiplying, adding, and reasoning to back-calculate the missing value that results in the given mean.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Statistics - Mean with Value Missing Worksheet

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Statistics - Mean with Value Missing
1
0, 2, 25, 16, ? mean = 11
What is the missing number that results in these numbers having the given mean
a
7
b
12
c
14
d
15
e
11
f
9
2
8, ?, 2, 11, 8 mean = 8
What is the missing number that results in these numbers having the given mean
a
13
b
7
c
11
d
6
e
9
f
12
3
3, 9, 3, ?, 6 mean = 6
What is the missing number that results in these numbers having the given mean
a
14
b
8
c
3
d
9
e
13
f
10
4
2, 5, 24, ?, 11 mean = 9
What is the missing number that results in these numbers having the given mean
a
7
b
3
c
2
d
6
e
0
f
1
5
?, 3, 11, 9, 4 mean = 8
What is the missing number that results in these numbers having the given mean
a
7
b
12
c
16
d
13
e
10
f
17
6
5, 2, 14, 12, ? mean = 7
What is the missing number that results in these numbers having the given mean
a
2
b
0
c
5
d
6
e
3
f
4
7
14, 3, 25, 10, ? mean = 13
What is the missing number that results in these numbers having the given mean
a
10
b
16
c
14
d
9
e
13
f
17
8
5, 17, 16, 4, ? mean = 12
What is the missing number that results in these numbers having the given mean
a
15
b
19
c
14
d
17
e
20
f
18