8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - வினைமுற்று Important Questions And Answers Study Material - QB365 Set A
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TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - மயங்கொலிகள் Important Questions And Answers Study Material - QB365 Set A
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TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை -பட்டமரம் Important Questions And Answers Study Material - QB365 Set A
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TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - இயற்கையை போற்றுவோம் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 1 - தமிழ் இன்பம் - ஆழிக்கு இணை Important Questions And Answers Study Material - QB365 Set A
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TN 8th Tamil இயல் 2-ஈடில்லா இயற்கை - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
Published on: 15/06/2021
QB365 provides detailed and simple solution for every book back questions in class 8 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 8th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
Draw a frequency polygon for the following data without using histogram
| Class interval (Marks) | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 |
| Frequency | 4 | 6 | 8 | 12 | 10 | 14 | 5 | 7 |
2.
Draw a frequency polygon for the following data using histogram
| marks | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 | 90-100 |
| Number of students | 5 | 8 | 10 | 18 | 25 | 22 | 20 | 13 | 6 | 3 |
3.
The following is the distribution of pocket money of 200 students in a school.
| Pocket money | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 |
| Number of Students | 25 | 40 | 33 | 28 | 30 | 20 | 16 | 8 |
Draw a frequency polygon using histogram.
4.
The following table gives the number of literate females in the age group 10 to 45 years in a town.
| Age group | 10-15 | 16-21 | 22-27 | 28-33 | 34-39 | 40-45 |
| No. of females | 350 | 920 | 850 | 480 | 230 | 200 |
Draw a histogram to represent the above data
5.
Draw a histogram for the following table which represents the age groups from 100 people in a village.
| Ages | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 |
| Number of people | 11 | 9 | 8 | 20 | 25 | 10 | 8 | 6 | 3 |
1.
Find the midpoint of the class intervals and tabulate it.
| Class interval ( C.I) | Mid point (x) | Frequency (f) |
| 10 – 20 | 15 | 4 |
| 20 – 30 | 25 | 6 |
| 30 – 40 | 35 | 8 |
| 40 – 50 | 45 | 12 |
| 50 – 60 | 55 | 10 |
| 60 – 70 | 65 | 14 |
| 70 – 80 | 75 | 5 |
| 80 – 90 | 85 | 7 |
The points are A(5,0) B(15,4) C(25,6) D(35,8) E(45,12) F(55,10) G(65,14) H(75,5) I(85,7) J(95,0).
In the graph sheet, mark the midpoints along the x- axis and the frequency along the y- axis.
We take the imagined class as 0 – 10 at the beginning and 90 – 100 at the end , each with frequency ‘zero’.
From the table, plot the points. We draw the line segments AB, BC, CD, DE, EF, FG, GH, HI, IJ to obtain the required frequency polygon ABCDEFGHIJ.
2.
Mark the class intervals along the x-axis and the number of students along the y-axis . Draw a histogram for the given data and mark the midpoints of the rectangles and join them by lines. We get frequency polygon. Note that the first and last edges of the frequency polygon meet at the mid points of the left and right vertical edges of first and last rectangles. Because imagined class intervals do not exist in the marks (refer the above note).
3.
Represent the pocket money along x- axis and number of students along the y–axis.
Draw a histogram for the given data. Now, mark the midpoints of the upper sides of the consecutive rectangles. Also mark the midpoints of two imagined class intervals 0-10 and 90-100 whose frequency is 0 on x- axis. Now, join all the midpoints with the help of ruler. We get a frequency polygon imposed on the histogram.
4.
The given distribution is discontinuous. If we represent the given data as it is by a graph we shall get a bar graph, as there will be gaps in between the classes. So, convert this into a continuous distribution using the adjustment factor 0.5.
The first class interval can be written as 9.5-15.5 and the remaining class intervals are changed in the same way. There are no changes in frequencies.
The new continuous frequency table is
| Age group | 9.5-15.5 | 15.5-21.5 | 21.5-27.5 | 27.5-33.5 | 33.5-39.5 | 39.5-45.5 |
| No of females | 350 | 920 | 830 | 480 | 230 | 200 |
The histogram is constructed as below
5.
The given data is a continuous frequency distribution. The class intervals are drawn on x axis and their respective frequencies on y-axis. Classes (ages) and its frequencies (number of people) are taken together to form a rectangle.
The histogram is constructed as given below
8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - பாடறிந்து ஒழுகுதல் Important Questions And Answers Study Material - QB365 Set A
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Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
