expenditure which
Class 10 Then, find the average number of manual
is done by the maximum
Assignment workers.
(a) 1747.26 (b) 1847.26
(d) 2047.26
Ch 13 Statistics (c) 1947.26
mode and median of a
7
If the difference of
difference of median
1 If the arithmetic mean of the following data is 24, then the
distribution is 47, then the value of pis and mean is
(b) 24 (c) 8 () 36
Class interval 0-20 20-40 40-60' 60-80 80-100 (a) 12
While computing the mean of grouped
Frequency 8 15 20 p 5 frequencies are
assume that the
data, we
classes
(a) 10 (b) 11 (c) 13 (d) 12 (a) evenly distributed over all the
The following table shows the literacy rate marks the classes
of
(b) centred at the class
(in percentage) of 35 cities. (c) centred at the upper
limits of the classes
of the classes
Lteracy rate (in %) 45-55 55-65 65-75 75-85 85-95 (d) centred at the lower limits
distribution
Number of cities 10 11 8 3 For the following
Number of Marks Numbero
Marks students
The mean literacy rate is students
(b) 60.50 (c) 69.43 (d) 59.43 Below 40 57
(a) 50.43 Below 10 3
3 Mode of the following grouped frequency Below 20 12 Below 50 75
distribution is 80
Below 30 28 Below 60
3-6 6-9 9-12 12-15 15-18 18-2121-24
Class
1 23 21 12 3 The modal class is
FrequencyY 2 (b) 20-30
(a) 0-20
(b) 15.6 (c) 14.6 (d) 16.6 (d) 50-60
(a) 13.6 (c) 30-40
= 137.05, then
If median = 137 and mean 10 Astudent noted the number of cars passing
the value of mode is through a spot on a road for 100 periods
table
(a) 156.90 (b) 136.90 each of 3 min and summarised in the
(c) 186.90 (d) 206.90 given below.
is useful in
5
The cumulative frequency table Number of cars Frequency
determining 0-10
(b) median
(a) mean 10-20
(d) All of these
(c) mode 20-30 13
distribution
The following data gives the ) of
30-40 12
of total household expenditure (in 40-50 20
manual workes ina city. 50-60 11
Expenditure (in ) Frequency 60-70 15
1000-1500 24 70-80 8
40
1500-2000 Then, the mode of the data is
2000-2500 33 (a) 34.7 (b) 44.7
28 (c) 54.7 (d) 64.7
2500-3000
3000-3500 30 11 Ifu, = -20
10
,Elu, =30 and í, =40, then
3500-4000 find the value of R.
4000-4500 16 12 -250 u=20 and El, = 100,
4500-5000 7
If u, = 1
then find the value of .
Class 10 Then, find the average number of manual
is done by the maximum
Assignment workers.
(a) 1747.26 (b) 1847.26
(d) 2047.26
Ch 13 Statistics (c) 1947.26
mode and median of a
7
If the difference of
difference of median
1 If the arithmetic mean of the following data is 24, then the
distribution is 47, then the value of pis and mean is
(b) 24 (c) 8 () 36
Class interval 0-20 20-40 40-60' 60-80 80-100 (a) 12
While computing the mean of grouped
Frequency 8 15 20 p 5 frequencies are
assume that the
data, we
classes
(a) 10 (b) 11 (c) 13 (d) 12 (a) evenly distributed over all the
The following table shows the literacy rate marks the classes
of
(b) centred at the class
(in percentage) of 35 cities. (c) centred at the upper
limits of the classes
of the classes
Lteracy rate (in %) 45-55 55-65 65-75 75-85 85-95 (d) centred at the lower limits
distribution
Number of cities 10 11 8 3 For the following
Number of Marks Numbero
Marks students
The mean literacy rate is students
(b) 60.50 (c) 69.43 (d) 59.43 Below 40 57
(a) 50.43 Below 10 3
3 Mode of the following grouped frequency Below 20 12 Below 50 75
distribution is 80
Below 30 28 Below 60
3-6 6-9 9-12 12-15 15-18 18-2121-24
Class
1 23 21 12 3 The modal class is
FrequencyY 2 (b) 20-30
(a) 0-20
(b) 15.6 (c) 14.6 (d) 16.6 (d) 50-60
(a) 13.6 (c) 30-40
= 137.05, then
If median = 137 and mean 10 Astudent noted the number of cars passing
the value of mode is through a spot on a road for 100 periods
table
(a) 156.90 (b) 136.90 each of 3 min and summarised in the
(c) 186.90 (d) 206.90 given below.
is useful in
5
The cumulative frequency table Number of cars Frequency
determining 0-10
(b) median
(a) mean 10-20
(d) All of these
(c) mode 20-30 13
distribution
The following data gives the ) of
30-40 12
of total household expenditure (in 40-50 20
manual workes ina city. 50-60 11
Expenditure (in ) Frequency 60-70 15
1000-1500 24 70-80 8
40
1500-2000 Then, the mode of the data is
2000-2500 33 (a) 34.7 (b) 44.7
28 (c) 54.7 (d) 64.7
2500-3000
3000-3500 30 11 Ifu, = -20
10
,Elu, =30 and í, =40, then
3500-4000 find the value of R.
4000-4500 16 12 -250 u=20 and El, = 100,
4500-5000 7
If u, = 1
then find the value of .
