EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Average
Grade : ICSE Grade VII
License : Non Commercial Use
Question
1
1.
The arithmetic mean of
10
31
42
10
10
6
is
(i)
16.17
(ii)
18.17
(iii)
20.17
(iv)
17.17
(v)
19.17
Question
2
2.
Find the mean of all prime numbers between 40 and 100.
(i)
861
13
(ii)
199
3
(iii)
863
13
(iv)
865
13
(v)
731
11
Question
3
3.
Find the mean of the first 10 even numbers.
(i)
12
(ii)
11
(iii)
13
(iv)
9
(v)
10
Question
4
4.
Find the mean of all prime numbers between 40 and 80.
(i)
297
5
(ii)
415
7
(iii)
179
3
(iv)
59
(v)
299
5
Question
5
5.
Temperatures of 10 days are given below. Find the mean.
Temperature (in degree C)
25
26
29
31
33
35
No. of days
3
1
1
1
1
3
(i)
319
10
°C
(ii)
299
10
°C
(iii)
301
10
°C
(iv)
30
°C
(v)
309
10
°C
Question
6
6.
The mean of
8
numbers is
8
5
8
.
Upon
adding
one number,
the mean becomes
8
1
3
.
Find the
included
number.
(i)
9
(ii)
4
(iii)
7
(iv)
5
(v)
6
Question
7
7.
Given the mean of
12
samples as
5
5
12
,
what is the new mean if two samples
5
and
5
are removed ?
(i)
11
2
(ii)
21
4
(iii)
13
2
(iv)
6
(v)
9
2
Question
8
8.
If the mean of
7
samples is
29
3
7
,
what is the new mean if each number is multiplied by
7
.
(i)
205
(ii)
208
(iii)
204
(iv)
206
(v)
207
Question
9
9.
If the mean of
4
samples is
24
,
what is the new mean if each number is multiplied by
3
.
(i)
72
(ii)
73
(iii)
71
(iv)
70
(v)
74
Question
10
10.
Given the mean of
14
samples as
8
4
7
,
what is the mean if a sample value is
increased
by
12
?
(i)
64
7
(ii)
68
7
(iii)
66
7
(iv)
48
5
(v)
28
3
Question
11
11.
If the mean of
6
samples is
29
2
3
,
what is the new mean if
5
is subtracted from each number.
(i)
26
(ii)
24
(iii)
74
3
(iv)
122
5
(v)
76
3
Question
12
12.
Find the mean of first 7 whole numbers.
(i)
1
(ii)
6
(iii)
4
(iv)
2
(v)
3
Question
13
13.
If the mean of
4
samples is
34
,
what is the new mean if
4
is added to each number.
(i)
39
(ii)
37
(iii)
38
(iv)
35
(v)
40
Question
14
14.
Given the mean of
10
samples as
5
3
10
,
what is the new mean if two samples
1
and
1
are added ?
(i)
53
12
(ii)
9
2
(iii)
19
4
(iv)
55
12
(v)
47
10
Question
15
15.
Find the mean of the first 10 odd numbers.
(i)
7
(ii)
12
(iii)
10
(iv)
11
(v)
9
Question
16
16.
Find the mean of all prime numbers between 30 and 100.
(i)
1055
17
(ii)
807
13
(iii)
311
5
(iv)
931
15
(v)
929
15
Question
17
17.
The arithmetic mean of
40
14
1
41
25
1
is
(i)
19.33
(ii)
20.33
(iii)
22.33
(iv)
21.33
(v)
18.33
Question
18
18.
Given the mean of
12
samples as
5
1
3
,
what is the new mean if two samples
1
and
6
are removed ?
(i)
59
10
(ii)
67
12
(iii)
57
10
(iv)
11
2
(v)
47
8
Question
19
19.
Find the mean of first 7 multiples of 10.
(i)
41
(ii)
38
(iii)
40
(iv)
39
(v)
43
Question
20
20.
Given the mean of
9
samples as
12
1
9
,
what is the mean if a sample value is
decreased
by
13
?
(i)
52
5
(ii)
10
(iii)
12
(iv)
32
3
(v)
34
3
Question
21
21.
Find the mean of first 5 whole numbers.
(i)
3
(ii)
2
(iii)
5
(iv)
1
(v)
0
Question
22
22.
Find the mean of the first 15 even numbers.
(i)
19
(ii)
14
(iii)
16
(iv)
17
(v)
15
Question
23
23.
Temperatures of 20 days are given below. Find the mean.
Temperature (in degree C)
25
26
27
28
29
30
31
32
34
35
No. of days
1
4
1
2
2
1
3
3
2
1
(i)
30
°C
(ii)
153
5
°C
(iii)
158
5
°C
(iv)
148
5
°C
(v)
149
5
°C
Question
24
24.
The mean of
6
numbers is
9
1
2
.
Upon
excluding
one number,
the mean becomes
8
2
5
.
Find the
excluded
number.
(i)
14
(ii)
15
(iii)
18
(iv)
16
(v)
12
Question
25
25.
Find the mean of first 6 multiples of 13.
(i)
181
4
(ii)
46
(iii)
91
2
(iv)
93
2
(v)
89
2
Assignment Key
1) (ii)
2) (iii)
3) (ii)
4) (i)
5) (ii)
6) (v)
7) (i)
8) (iv)
9) (i)
10) (iii)
11) (iii)
12) (v)
13) (iii)
14) (iv)
15) (iii)
16) (iv)
17) (ii)
18) (iii)
19) (iii)
20) (iv)
21) (ii)
22) (iii)
23) (iv)
24) (ii)
25) (iii)
