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Data Handling - Class 7 Maths - Extra Questions

Find the mode and mean of the data : 3,4,5,4,6,4,7,5,8,4,6,4,7,8,6,4,3



Find the mean of each of the data. 3,8,6,17,12,14



Find the mean of x+3,x+5,x+7,x+9 and x+11.



If the mean of 16,14,x,23,20 is 18, find the value of x.



The mean (average) weight of three students is 40 kg. One of the students Ranga weighs 46 kg. The other two students, Rahim and Reshma have the same weight. Find Rahims weight



The average of 2,4,6 and 8? 



The mean of the numbers p+5,25,32,11,3p1 and 16 is 22.Find the value of p.



Find the mean of each of the data 23,36,29,31,43



The marks (out of 100) obtained by group of students in a science test are 85,76,90,85,39,48,56,95,81 and 75. Find the:

1)Highest and lowest marks obtained by students.
2)Mean marks obtained.
3)No. of students who obtained marks more than mean marks.



The weight of 11 members of the school football team given in kg is as follows 38,41,47,32,33,36,38,40,41,49,44
What is the average weight?



A football player 3, 4, 3, 5, 4, 5, 4 goals in 7 matches. Find the mean of the goals.



The height (in cm) of 8 girls of a class are 140, 142, 135, 137,150,148 and 138 respectively. Find the mean height of these girls and their median height.



Find the average of each of the following sets.
(i) 48,23,13,54,7
(ii) 3 kg,47 kg,92 kg,28 kg



Find the mean of numbers 25,30,27,23 and 25



The daily rainfall for each day of a week in a certain city is given in millimetres. Find the average rainfall during the week.
9,12,11,8,20,16,18



Find the mean of 73,96,80,88,78



The mean of 13,98,90,31,15 is.



The mean of first 20 natural numbers is 



Find the mean of 12,15,18,21,24



find the mean of 37,51,42,96,84



The mean of 42,61,53,80,x is  55 find x.



Find the mean of 1,6,7,3,8



If the mean of 8,12,21,42,x is 20 find the value of x.



8kg of tea consisting Rs240 per kg is mixed with 9kg of tea costing Rs25o per kg. The average price per kg of the mixed tea is



Find the arithmetic mean of the following distribution:
Marks obtained1015202530
No. of students246810



Find the mean of the following distribution:
ClassNumber of students
4-82
8-1212
12-1615
16-2025
20-2418
24-2812
28-3213
32-363



Find the mean of the following data:
Class interval0-1010-2020-3030-4040-50
Frequency12118109



Find the mean of the first 10 natural numbers.



During the twelve months of 1998, an executive charged 4,1,5,6,3,5,1,0,5,6,4 and 3 business luncheons at the Wardlaw Club. What was the mean monthly number of luncheons charged by the executives? If the mean is x then find 100x.



The marks obtained by 10 students in a test are 15,75,33,67,76,54,39,12,78,11. Find the arithmetic mean.



Find the arithmetic mean of the marks 72,73,75,82,74 obtained by a student in 5 subjects in an annual examination.



Rice consumed in a school under the mid-day meal program for 5 consecutive days is 15.750 kg, 14.850 kg, 16.500 kg, 14.700 kg, and 17.700 kg. Find the average rice consumption for the 5 days.
704628_4c8189208ef3435196735457b9e9dd12.png



Write at least two questions to find the mean, giving suitable data.



Find the mean of the following distribution
x:1030507089
f:78101510



The average temperature on Saturn is 288oF, while that on Jupiter is 162oF. Which planet has the average temperature?



The following are the numbers of books issued in a school library during a week:105,216,322,167,273,405 and 346.Find the average number of books issued per day.



The mean of three numbers a,b and c is 8 and the mean of five numbers a,b,c,d and e is 15. Find the mean of d and e?



The mean of x,x+2,x+4,x+6 and x+8 is 11, find the mean of the first three observations.



The mean of 18,24,15,2x+1 and 12 is 21. Find the value of x.



34,66,30,38,44,50,40,60,42,51.



Find arithmetic mean of following data:
38,70,48,34,42,55,63,46,54,44.



22,24,30,27,29,31,25,28,41,42.



The mean of the numbers 6,y,7,x,14 is 8. Express y in terms of x



Show that the set of letters needed to spell "CATARACT" and the set of letters needed to spell "TRACT" are equal.



Find the mean and variance for the given data
First 10 multiplies of 3



Out of 25 numbers, the mean of 15 numbers is 36 and the mean of the remaining number is 26; find the mean of all the 25 numbers.



Sum of deviation of variate fron their A.M is always zero that is (xi¯x)=0 sum of square of deviation of variate from their A.M is minimum that is (xi¯x)=02 is minimum



Find the mean for the data.
1224517_7647c87c2d2e4dc799badaade22646b5.png



The average of 6 numbers is 9. If 2 is added to each number, what will be the new average?



Find the mean and median of following data :
38,70,48,40,42,46,66,68,46,54,44



The mean age of 5 children in a family is 12 years, if four of them are respectively 6,11,13 and 16 years find the age of the fifth child.



The table shows the points of each player scored in four games.
 Players Game I Game II Game III  Game IV
 X 1416 10 10 
 Y 0 6 4
 Z 811 Did not play   13
Y played in all the four games, how would you find mean?



The yield of soyaber per acre in the form of mode for 7 years was 10,7,5,3,9,6,9 quintal. Find the mean of yeild per acre .



Following table shown the points of each player scored in from games.
PlayerGame 1Game 2Game 3Game 4
A14161010
B0864
C811did not play13
Who is the best performer?



The ages of 5 girls in a group are : 16 years 4 months; 15 years 8 months ; 14 years 9 months; 15 years 3 months and 14 years 8 months. Find their mean.



Find the mean of the numbers 8,12,5,6,10,7.



The mode of students in maths are 10,11,13,12, find average marks of students. 



If the mean of five observation x,x+2,x+4,x+6 and x+8 is 13, then find the value of x.



Find the mean of the following data.
 Class Intervals 01011202130314041505160 Frequency 4791073



Find the mean of given data.
x+77,x+7,x+5,x+3,x+2.



The average of a set of 5 numbers isA number 14 is deleted from the set. What is the average of the remaining four numbers.



Find the sum of 59,41,73,92,81,(41),3.



Average of 9 numbers is 14. If one number 12 is excluded, find the new average.



Find the A.M. between 7 and 13.



Find the mean of the first five even whole numbers.



Find the A.M. of 12 and -8.



Find the A.M. of (x-y) and (x+y).



A cricketer scores the following runs in 8 innings : 58, 76, 40, 35, 48, 45, 0,Find the mean score.



Calculate the arithmetic mean of 5.7, 6.6, 7.2, 9.3, 6.2.



The weight (in kg) of 8  new born babies are 3,3.2,3.4,3.5,4,3.6,4.1,3.2 . Find the mean weight of the babies. 



In a class test, the mean of marks scored by a class of 46 students was calculated as  18.2. Later on, it was detected that the marks of one student were wrongly copied as  21 instead of 29. Find the correct mean.



The marks obtained by 15 students in a class test are 12, 14, 07, 09, 23, 11, 08, 13, 11, 19, 16, 24, 17, 03, 20.find the mean of their marks when 2 marks are deducted from the marks of each student.



The marks obtained by 15 students in a class test are 12, 14, 07, 09, 23, 11, 08, 13, 11, 19, 16, 24, 17, 03, 20.find the mean of their marks when the marks of each student are increased by 4.



The marks obtained by 15 students in a class test are 12, 14, 07, 09, 23, 11, 08, 13, 11, 19, 16, 24, 17, 03, 20.find the mean of their marks.



Find the mean of 25 given numbers when the mean of 16 of them is 13 and the mean of the remaining numbers is 18.



The marks obtained by 15 students in a class test are 12, 14, 07, 09, 23, 11, 08, 13, 11, 19, 16, 24, 17, 03, 20.find the mean of their marks when the marks of each student are doubled.



Find the mean of the following data:
40, 30, 30, 0, 26, 60



Fill in the blanks:
The mean of the first 8 natural numbers is ............



Find the mean of the following distributions:
Number5101520253035
Frequency1 2 5 6 3 2 1



At a shooting competition, the scores of a competitor were as given below :

Score

0

1

2

3

4

5

No. of shots

0

3

6

4

7

5

What was his mean?



A boy scored the following marks in various class tests during a term each test being marked out of 20: 15, 17, 16, 7, 10, 12, 14, 16, 19, 12, 16. What are his mean marks?



If the arithmetic mean of 8,4,x,6,2,7 is 5, then the value of x is _____



A car seller collects the following data of cars sold in his shop.
Colour of CarNumber of Cars Sold
        Red         15
      Black
         20
      White
         17
     Silver         12
     Others          9
(a) Which colour of the car is most liked?
(b) Which measure of central tendency was used in (a)?



Find the mean of first six multiples of 4.



The following are weights (in kg) of 12 people.
70,62,54,57,62,84,75,59,62,65,78,60
(a) Find the mean of the weights of the people.
(b) How many people weigh above the mean weight ?
(c) Find the range of the given data.



The mean of three numbers isThe mean of other four numbers is 12. Find the mean of all the numbers.



Find the mean of the following data:
3, 5, 7, 9, 11, 13, 15



A batsman scored the following number of runs in six innings:
36, 35, 50, 46, 60, 55
Calculate the mean runs scored by him in an inning.



The mean of six numbers:x-5, x- 1, x, x + 2, x + 4 and x + 12 is 15. Find the mean of first four numbers.



Find the mean of first six multiples of 5.



Find the mean of first six natural numbers.



Find the mean of first six multiples of 3.



Find the mean of 53, 61, 60, 67 and 64.



Find the mean of the following set of numbers: 6, 9, 11, 12 and 7



If different values of variable x are 19.8, 15.4, 13.7, 11.71, 11.8, 12.6, 12.8, 18.6, 20.5\ and\ 21.1, find the mean.



Find the mean of squares of first five whole numbers.



The pocket expenses (per day) of Anuj, during a certain week, from Monday to Saturday were 85.40, 88.00, 86.50, 84.75, 82.60 and 87.25. Find the mean pocket expenses per day.



Find the mean of the following set of numbers: 11, 14, 23, 26, 10, 12, 18 and 6



Marks obtained (in mathematics) by 9 student are given below:
60, 67, 52, 76, 50, 51, 74, 45 and 56
(a) find the arithmetic mean
(b) if marks of each student be increased by 4; what will be the new value of arithmetic mean.



Find the mean of the natural numbers from 3 to 12.



(a)Find the mean of 7, 11, 6, 5, and 6
(b) If each number given in (a) is diminished by 2, find the new value of mean.



The following table gives the ages of 50 students of a class. Find the arithmetic mean of their ages.
1834232_a8cf13b40b694a0b8889c15cb47a1906.PNG



The following table shows the income of farmers in a grape season. Find the mean of their income.
Income
(Thousand Rupees)
20 - 3030 - 4040 - 5050 - 6060 - 7070 - 80
Farmers101115161814



The loans sanctioned by a bank for construction of farm ponds are shown in the following table. Find the mean of the loans.
Loan
(Thousand Rupees)
40 - 5050 - 6060 - 7070 - 8080 - 90
No. of farm ponds132024
36
7



The following frequency distribution table shows the amount of od aid given to 50 flood-affected families. Find the mean of the amount of aid.
Amount of Aid
(thousand rupee)
50-6060-7070-8080-9090-100
No. of families7132064



The weekly wages of 120 workers in a factory are shown in the following frequency distribution table. Find the mean of the weekly wages.
Weekly wages
(Rupees)
0 - 20002000 - 40004000 - 6000 6000 - 8000
No. of workers15355020



Find the mean weight from the following table :
Weight (kg)No.of children
2902
3001
3104
3203
3305



Calculate the mean for the following frequency 
Mark10 - 2020 - 30 30 - 4040 - 5050 -6060-  70
Frequency3710682



Runs scored by 10 batsman in a one day cricket match are given . Find the average run scored.
23 , 54, 08 ,94 , 60 ,18 , 29 , 44 , 05 , 86.



x10151720223035
f51028366



x19212325272931
f13151618161513



x123456
f452519821



Consider the following distribution of daily wages of 40 workers of a factory and by using suitable method, find mean daily wages of the workers of this factory:
Daily wages (in Rs.)25-3535-4545-5555-6565-75
No. of workers6108124



Find mean of the following distribution :
Class1-33-55-77-10
Frequency9222717



To find concentration (part per million) of (SO-{2}) Sulphur dioxide in air data is collected from 30 colonies of a city which are given below :
Concentration
of SO_{2} (ppm)
0.00-0.040.04-0.080.08-0.120.12-0.160.16-0.200.20-0.24
Frequency499242
Find mean of concentration of (SO_{2}) in Air.



Weight of 30 students of a class at the time of medical test is recorded as per table given below :
Weight (in kg)40-4545-5050-5555-6060-6565-7070-75
No. of students2386632
Find mean weight of students.



If arithmetic mean of following data is 15 then find p.
Variable x_{i} 510152025
Frequency f_{i} 6P6105



Find the mean salary of 60 workers of a factory from the following table :


1880154_35681b0e4e92475bbc1c469ba04cef56.PNG



Find the average of five numbers 40, 35, 30, 50, 45.



If the mean of 1,2,3,.......x is \dfrac { 6x }{ 11 } , find the value of x



A die was thrown 20 times and the following outcomes were recorded :-
     5, 2, 1, 3, 4, 4, 5, 6, 2, 2, 4, 5, 5, 6, 2, 2, 4, 5, 5, 1
Find the mean and mode of the above data



Coefficient of variation of two distributions are 60% and 80% respectively, and their standard deviations are 21 and 16 respectively. Find their arithmetic means.



Class 7 Maths Extra Questions