EduSahara™ Assignment
Name : Average
Chapter : Average
Grade : ICSE Grade VII
License : Non Commercial Use
Question
1
1.
The arithmetic mean of
8
49
26
34
34
is
(i)
28.2
(ii)
29.2
(iii)
30.2
(iv)
32.2
(v)
31.2
Question
2
2.
If the mean of
7
samples is
28
5
7
,
what is the new mean if
3
is added to each number.
(i)
222
7
(ii)
32
(iii)
284
9
(iv)
220
7
Question
3
3.
If the mean of
7
samples is
24
3
7
,
what is the new mean if
9
is subtracted from each number.
(i)
110
7
(ii)
108
7
(iii)
106
7
(iv)
46
3
(v)
78
5
Question
4
4.
If the mean of
4
samples is
22
1
4
,
what is the new mean if each number is multiplied by
7
.
(i)
623
4
(ii)
313
2
(iii)
311
2
(iv)
621
4
(v)
625
4
Question
5
5.
The mean of
8
numbers is
10
1
4
.
Upon
excluding
one number,
the mean becomes
10
.
Find the
excluded
number.
(i)
15
(ii)
9
(iii)
12
(iv)
13
(v)
11
Question
6
6.
The mean of
10
numbers is
12
1
10
.
Upon
adding
one number,
the mean becomes
12
6
11
.
Find the
included
number.
(i)
17
(ii)
18
(iii)
16
(iv)
19
(v)
15
Question
7
7.
Temperatures of 25 days are given below. Find the mean.
Temperature (in degree C)
26
27
30
31
32
33
34
35
No. of days
4
2
4
4
2
3
2
4
(i)
798
25
°C
(ii)
774
25
°C
(iii)
773
25
°C
(iv)
31
°C
(v)
823
25
°C
Question
8
8.
Given the mean of
10
samples as
12
1
5
,
what is the mean if a sample value is
increased
by
16
?
(i)
43
3
(ii)
71
5
(iii)
95
7
(iv)
67
5
(v)
69
5
Question
9
9.
Given the mean of
13
samples as
10
5
13
,
what is the mean if a sample value is
decreased
by
20
?
(i)
9
(ii)
115
13
(iii)
113
13
(iv)
131
15
Question
10
10.
Given the mean of
10
samples as
6
1
10
,
what is the new mean if two samples
10
and
3
are added ?
(i)
25
4
(ii)
13
2
(iii)
49
8
(iv)
35
6
(v)
37
6
Question
11
11.
Given the mean of
12
samples as
4
1
6
,
what is the new mean if two samples
6
and
9
are removed ?
(i)
5
2
(ii)
9
2
(iii)
4
(iv)
13
4
(v)
7
2
Question
12
12.
Find the mean of all prime numbers between 50 and 60.
(i)
53
(ii)
56
(iii)
58
(iv)
55
(v)
57
Question
13
13.
Find the mean of all prime numbers between 30 and 90.
(i)
415
7
(ii)
299
5
(iii)
417
7
(iv)
419
7
(v)
535
9
Question
14
14.
Find the mean of first 9 multiples of 9.
(i)
45
(ii)
44
(iii)
42
(iv)
46
(v)
48
Question
15
15.
Find the mean of first 8 whole numbers.
(i)
4
(ii)
13
4
(iii)
7
2
(iv)
5
2
(v)
9
2
Question
16
16.
Find the mean of first 6 multiples of 7.
(i)
49
2
(ii)
97
4
(iii)
51
2
(iv)
47
2
(v)
25
Question
17
17.
Find the mean of the first 10 odd numbers.
(i)
13
(ii)
9
(iii)
11
(iv)
10
(v)
7
Question
18
18.
Find the mean of the first 10 even numbers.
(i)
11
(ii)
10
(iii)
13
(iv)
12
(v)
8
Assignment Key
1) (iii)
2) (i)
3) (ii)
4) (i)
5) (iii)
6) (i)
7) (iii)
8) (v)
9) (ii)
10) (v)
11) (v)
12) (ii)
13) (iii)
14) (i)
15) (iii)
16) (i)
17) (iv)
18) (i)
