CBSE Class 7 Mathematics Data Handling Assignment Set A

1 What is the arithmetic mean of 1, 2, .... , 9 and 10?
(A) 5.5
(B) 6
(C) 7.5
(D) 10
Answer : A

2 In a data, 10 numbers are arranged in increasing order. If the 71h entry is increased by 4, by how much does the median increase?
(A) Zero
(B) 4
(C) 6
(D) 5
Answer : A

3 What is the mean of x, x + 3, x + 6, x + 9 and x + 12?
(A) X + 3
(B) X + 6
(C) X + 9
(D) X + 12
Answer : B

4 The daily sales of kerosene (in litres) in a ration shop for six days is given in the box. 
75, 120, 12, 50, 70.5, 140.5 
What is the average daily sale?
(A) 150 l
(B) 1 0 l
(C) 142 l
(D) 78l
Answer : D

5 The mean of five numbers is 27. If one of the numbers is excluded, the mean gets reduced by 2. What is the excluded number?
(A) 35
(B) 27
(C) 25
(D) 40
Answer : A

6 What is the median of the data 46, 64, 87, 41,58,77,35,90,55,33,92?
(A) 87
(B) 77
(C) 58
(D) 60.2
Answer : C

7 Which of the following is true about mean?
(A) It occurs most frequently.
(B) It d ivides observations into two equal parts.
(C) It is representative of the whole group.
(D) It is the sum of observations.
Answer : C

8 If each entry of a data is increased by 5,how does the mean change?
(A) Remains the same .
(B) Increases by 5.
(C) Decreases by 5.
(D) Becomes half.
Answer : B

9 The arithmetic mean of five given numbers is 85. What is their sum?
(A) 425
(B) 85
(C) A number between 85 and 425.
(D) A number greater than 500.
Answer : A

10 The average weight of a sample of 10 apples is 52 g. Later it was found that the weighing machine had shown the weight of each apple 10 g less. What is the correct average weight of an apple?
(A) 62 g
(B) 54 g
(C) 56 g
(D) 52 g
Answer : A

11 The mean of6,y, 7,xand 14 is 8.Which of the following is true?
(A) X + y = 13
(B) X - y = 13
(C) 2x + 3y = 13
(D) x² + y² = 15
Answer : A

12 Which of the following is correct about mode?
(A) It is central.
(B) It occurs most frequently.
(C) It lies between the maximum and minimum observations .
(D) It is the average of the two middle terms.
Answer : B

13 Rajani has a box with 6 marbles numbered from 1 to 6 on each of them.
She picks a marble from it without seeing. What is the probability that the marble picked has the number 3 on it?
(A) 1/6
(B) 2/3
(C) 3/4
(D) 1/4
Answer : A

(14-18): The heights of six mountains are 8200 m, 6000 m, 8600 m, 7500 m, 8800 m and 6500 m . Based on this information, answer the questions given.

14 What is the approximate average height of the mountains?
(A) 7657 m
(C) 7756 m
(B) 7600 m
(D) 7765 m
Answer : B

15 Find the median height of the mountains.
(A) 7850 m
(C) 8750 m
(B) 7580 m
(D) 5780 m
Answer : A

16 What is the mode of the heights?
(A) 6000
(B) 8800
(C) Does not exist
(D) 7 500
Answer : C

17 Which of the following statements is true?
(A) The mean height of the mountains is greater than their median height.
(B) The mean height of the mountains is less than their mode.
(C) The median height of the mountains is less than their mode.
(D) The median height of the mountains is greater than their mean height.
Answer : B

18 Rakesh and Sanjay planned to go  trekking on any of these mountains.
They wrote the heights on chits of paper, shuffled them and picked one. What is the probability that the height picked is the maximum?
(A) 1/3
(B) 2/3
(C) 1/6
(D) 1/4
Answer : C

(19-21): The ages (in years) of some teachers of a school are given in the box.
26, 32, 38, 41, 26, 31, 35, 33, 26, 37 l
Based on this information, answer the following questions.

19 What is the range of the ages of the teachers?
(A) 15 years
(C) 41 years
(B) 26 years
(D) 32 years
Answer : A

20 What is the mean age of the teachers?
(A) 23.5 years
(B) 32.5 years
(C) 35 years
(D) 38 years
Answer : B

21 What is the mode of the given data?
(A) 32 years
(B) 41 years
(C) 26 years
(D) 31 years
Answer :C 

(22-25): The heights of 10 students, measured in em are as follows:
143,132,150, 139,128,135, 151, 146, 141, 149
Based on this information, answer the following questions.

22 What is the height of the shortest girl?
(A) 128 em
(B) 141 em
(C) 151 em
(D) 150cm
Answer : A

23 What is the range of the data?
(A) 35 em
(B) 31 em
(C) 23 em
(D) 28 em
Answer : C

24 What is the mean height of the students?
(A) 141.4 em
(B) 141 em
(C) 142cm
(D) 151 em
Answer : A

25 The height of how many students is greater than the mean height?
(A) 4
(B) 3
(C) 5
(D) 2
Answer : C

26 In which of these situations is a double bar graph useful?
(i) Enrolment of students in class VII in 2009 and2010.
(ii) Marks obtained in Term I and Term II examinations.
(iii) Marks obtained in all subjects of a term examination.
(A) (i) and (ii)
(C) (iii) and (i)
(B) (ii) and (iii)
(D) (i) only
Answer : A

27 Which of these is certain to happen?
(A) You look younger today than yesterday.
(B) You look older today than yesterday.
(C) A tossed coin will land heads up.
(D) Tomorrow will be a cloudy day.
Answer : B

28 Which of these is impossible to happen ?
(A) A tossed coin lands with heads up.
(B) A tossed die lands up with 4 on top.
(C) The next traffic light is red.
(D) A die thrown lands up with 7 on top.
Answer : D

29 Which of these can happen but not certainly?
(A) A tossed coin lands with heads up.
(B) The sun rises in the east.
(C) A die thrown lands with 8 on the top.
(D) The Earth revolves around the Sun.
Answer : A

30 Which of these is impossible?
(A) The next traffic light seen is red.
(B) A tossed die lands up with 8 on top.
(C) A flipped coin lands up with head on top.
(D) It rains tommorow.
Answer : B

31 Find the range of the data.
128, 139, 148, 132, 152, 154,140,143,146,149,142
(A) 9
(B) 26
(C) 5
(D) 24
Answer : B

32 The table shows the number of hours Pavan studies on different days of a week.
Mon    Tue    Wed    Thurs    Fri    Sat
  3         4        2          5         4       3

How many hours per day does he study on an average?
(A) 3.5 hours
(C) 4 hours
(B) 3 hours
(D) 4.5 hours
Answer : A

(33-35): The bar graph shows the sales of fruits and vegetables in a store in 4 hours on a certain evening.

33 How many kilograms of fruits were sold during the four hours?
(A) 120 kg
(B) 124 kg
(C) 126 kg
(D) 144 kg
Answer : C

34 When was the sale of fruits lesser than that of vegetables?
(A) 7 p.m
(B) 6 p.m
(C) 8 p.m
(D) 5 p.m
Answer : B

35 During the four hours, which of the following is true about the sale of fruits and vegetables?
(A) The sale of vegetables was lesser than that of fruits.
(B) The sale of vegetables is 126 kg.
(C) The sale of fruits is 11 8 kg.
(D) The sale of vegetables is greater than that of fruits .
Answer : A

36 The number of chapatis needed for 30 students of a class are given in the box.
2, 1, 2, 3, 3, 2, 2, 2, 4, 4
3, 2, 3, 3, 2, 2, 2, 2, 3, 3
2, 3, 2, 2, 2, 3, 3, 3, 3, 4
Calculate the mode of the data.
(A) 3
(B) 2
(C) 1
(D) 4
Answer : B

Q1. Define the terms

a) data b) frequency of an observation c) mean of a data

d) median of a data e) mode of a data f) bar graph g) double bar graph

Q2. Prepare the frequency table for the following data:

5,2,1,3,4,4,5,6,2,2,4,5,5,6,2,2,4,5,5,1.

Q3. Find the mean of first five natural numbers.

Q4. Find the mean of first five prime numbers.

Q5. The ages (in years) of 50 players of a school are given below:

Find the mean age.

Q6. The weights of 10 students (kg) are:

40,52,34,47,31,35,48,41,44,38,42.

Find the median weight.

Q7. Calculate the median for the following data:

Q8. Find the median of first 10 even numbers.

Q9. The ages (in years) of 11 cricket players are given below:

28,34,32,41,36,32,32,38,32,40,31.

Please click the link below to download CBSE Class 7 Mathematics Data Handling Assignment Set A