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Maths Wiz Class 7 Solutions Chapter 15 Data Handling
Welcome to NCTB Solutions. Here with this post we are going to help 15th class students for the Solutions of Maths Wiz Class 7 Math Book, Chapter 15, Data Handling. Here students can easily find step by step solutions of all the problems for Data Handling, Exercise 15A and 15B Also here our mathematics teacher’s are solved all the problems with easily understandable methods with proper guidance so that all the students can understand easily. Here in this post students will get chapter 15 solutions. Here in this post all the solutions are based on ICSE latest Syllabus.
Data Handling Exercise 15A Solution :
Question no – (1)
Solution :
(a) What does 🚗represent?
= 10 Cars
(b) How many cars were sold in MayJune?
= (3 × 10)
= 30 cars
(c) In what period were 20 cars sold?
= Jan – Feb
(d) In what period were the most cars sold and how many?
= NovDec (5 × 10)
= 50 cars
Question no – (2)
Solution :
(a) Without counting, tell who gets the least pocket money each week?
= Radha
= (5 × 5
= 25)
(b) How much money did they get altogether?
= (40 × 5
= 200)
(c) Who gets exactly ₹ 45?
= John (9 × 5)
= 45
(d) How much money did Nirmala get?
= 5 × 6
= 30 Rs Nirmala get.
Question no – (3)
Solution :
The correct answer is option – (c) 750
Explanation :
1 Tree represent = 150 trees
∴ 5 tree represent,
= (150 × 5)
= 750 trees.
Question no – (4)
Solution :
The correct option is – (c) Mug
Explanation :
Mug = (5 × 100)
= 500 ml
= 1/2 litre
Question no – (5)
Solution :
August,
= 2000 × 6
= 12000 houses
September,
= 2000 × 3
= 6000 houses
October,
= 2000 × 5
= 10,000 houses
November,
= 2000 × 2
= 4000 houses
Question no – (6)
Solution :
‘⭐’ represents refrigerator which each are ‘5’
Months  July  August  September  October 
Number of refrigerator sets  ⭐⭐ ⭐⭐ 
⭐⭐⭐⭐ ⭐⭐⭐⭐ 
⭐⭐⭐ ⭐⭐ 
⭐⭐⭐ ⭐⭐⭐ 
Question no – (7)
Solution :
‘🏐’ represents games which each are ’10’
Games  Football  Hockey  Cricket  Badminton 
Number of students  🏐🏐🏐🏐🏐 🏐🏐🏐🏐🏐 🏐🏐🏐🏐🏐 🏐🏐🏐🏐🏐 
🏐🏐🏐🏐🏐 🏐🏐🏐🏐🏐 🏐🏐🏐🏐 
🏐🏐🏐🏐🏐 🏐🏐🏐🏐🏐 
🏐🏐🏐🏐🏐

Question no – (8)
Solution :
‘🎈’ represents number of absence which each are ‘1’
Weeks  Monday  Tuesday  Wednesday  Thursday  Friday  Saturday 
Nunmber of absentees  🎈🎈🎈  🎈🎈  🎈🎈🎈🎈  🎈🎈🎈  🎈  🎈🎈🎈🎈🎈 
Data Handling Exercise 15B Solution :
Question no – (1)
Solution :
Complete graph :
Question no – (2)
Solution :
(a) Name the person with the greatest number of heart beats per minute.
= Neha (70)
(b) What is the number of heart beats per minute for the person named in (a)?
= 70 (Neha)
(c) Name the person with the least number of heart beats per minute.
= Sachin (40)
(d) What is the number of heart beats per minute for the person named named in (c)?
= 40 (Sachin)
(e) What is the average number of heart beats per minute for the five people maned on the graph?
= Average heart beats,
= (70 + 60 + 50 + 45 + 40)/5
= 265/5
= 53
Question no – (3)
Solution :
(a) What is shown along the vertical axis?
= No of absent students.
(b) What is shown along the horizontal axis?
= Classes
(c) Which classes had the same number of absentees?
= Class (iv) and (vi)
(d) Which class had the most number of absentees?
= Class (iii)
Question no – (4)
Solution :
(a) What information is given by the bar graph?
= No of trees planted in city (A city tree plantation)
(b) How many trees were planted altogether in 2017?
= Total tree,
= (90 + 100 + 130 + 140 + 150 + 190 + 210 + 210 + 220)
= 1440 trees
(c) How many Neem trees were planted?
= 190 (Neem trees)
(d) How many more Gulmohar trees than Amaltas trees were planted?
= (220 – 150)
= 70 more Gulmohar trees planted.
(e) Name the tree which was planted maximum in number?
= Gulmohar (220 trees)
(f) What is the ratio of the number of Jamun trees planted to the number of Shahtoot trees planted?
= Jamun : Shahtoot
= 140 : 100
= 7 : 5
Question no – (5)
Solution :
(a) What information is given by the bar graph?
= Population of a tour
(b) What was the population in 1968?
= 125
(c) In which 20 year period did the population of the town change the most?
= 1968 – 1988
(d) How much did the population increase from 2008 to 2018?
= Increase,
= (425 – 375)
= 50
Question no – (6)
Solution :
Given marks,
Subjects  Maths  Science  GK  Hindi  English  SST 
Marks Obtained  70  75  60  80  55  65 
Required Bar graph :
Question no – (7)
Solution :
Given data,
Cars  Wagon R  Duster  Scorpio  Innova  Fortuner 
Number of students  7  5  4  3  6 
Required bar graph :
Question no – (8)
Solution :
Given data,
Name of Players  Virat Kohli  Shikhar Dhawan  Rohit Sharma  Suresh Raina  Yuvraj Singh  M.S. Dhoni 
Runs Scored  120  60  85  65  35  55 
Required bar graph :
Previous Chapter Solution :
👉 Chapter 1 👈