AP State Syllabus AP Board 7th Class Maths Solutions Chapter 7 Data Handling InText Questions and Answers.
AP State Syllabus 7th Class Maths Solutions 7th Lesson Data Handling InText Questions
Do This
Question 1.
In a unit test Amar secured 20, 18, 23, 21, 24 and 22 marks in Telugu, Hindi, English, Mathematics, Science and Social Science respectively. Peter got 23, 21, 20, 19, 24 and 17 marks in the above subjects respectively. Interpret the data in an organized manner. (Page No. 143)
Solution:
| Subjects | Amar | Peter |
| Telugu | 20 | 23 |
| Hindi | 18 | 21 |
| English | 23 | 20 |
| Maths | 21 | 19 |
| Science | 24 | 24 |
| Social | 22 | 17 |
Try This
Question 1.
The ages (in years) of players are in a team of 16,16,16,14,17,18. Then find the following:
i) Age of the youngest and the oldest player, (Page No. 145)
ii) Mean age of the players.
Solution:
i) The age of youngest player = 14 years
The age of oldest player = 18 years
(ii) Mean of the players = \(\frac{\text { Sum of the ages of all }}{\text { Number of players }}\)
= \(\frac{16+16+16+14+17+18}{6}=\frac{97}{6}\) = 16.16
Question 2.
What is the average number of glasses of water that you drink per day ? In a week. How did you find the average.
Solution:
Student Activity.
Try This
Question 1.
A data of 10 observations has a minimum value 15 and maximum value 25. What is the mean of the data? (Page No. 147)
(i) 12 (ii) 15 (iii) 21 (iv) 27
Solution:
(iii) 21
Question 2.
Observations of a data are 23, 45, 33, 21, 48, 30, 34, 36 and 35. Without actual calculation choose the mean of the data. (Page No. 147)
(i) 20
(ii) 35
(iii) 48
(iv) 50
Solution:
(ii) 35
Try This
Question 1.
One situation where mean would be an appropriate representative value. (Page No. 152)
Solution:
i) The quantity of rice required per day for conducting mid-day- meal programme,
ii) The daily income of a vegetable vendor.
Question 2.
One situation where mode would be an appropriate representative value. (Page No. 152)
Solution:
i) The size of the shoe required for to place the order by a shopkeeper,
ii) The brand of the notebook for a stationary .seller to place the order.
Try This
Question 1.
Find the modes of the following data. (Page No.150)
i) 5, 6, 3, 5,4, 9, 5, 6, 4, 9, 5
ii) 25, 14, 18, 15,17, 16, 19, 13, 12, 24
iii) 10,15, 20,15, 20, 10, 15, 20,10
i) 5, 6, 3, 5,4, 9, 5, 6, 4, 9, 5 – Mode 5
ii) 25, 14, 18, 15,17, 16, 19, 13, 12, 24 – No mode
iii) 10,15, 20,15, 20, 10, 15, 20,10 – No data