Table of Contents
Ans.(d)
Explanation:
The lower and upper class boundaries are contained within the class and do not intersect with either the upper boundary of the previous class or the lower boundary of the next class.
Ans. (c) a katex is not defined
Explanation:
Mean of observations katex is not defined
katex is not defined
∴ katex is not defined
katex is not defined + na
∴ Mean of katex is not defined+ na
katex is not defined + a
Marks | No. of students |
---|---|
5 | 6 |
10 | 4 |
15 | 6 |
20 | 12 |
25 | x |
30 | 4 |
Explanation:
Given Mean = 18
Marks | No. of students | Mid-value |
---|---|---|
(xi) | (fi) | fi × xi |
5 | 6 | 30 |
10 | 4 | 40 |
15 | 6 | 90 |
20 | 12 | 240 |
25 | x | 25x |
30 | 4 | 120 |
Total | 32 + x | 520 + 25x |
Class Interval | Frequency |
---|---|
0-50 | 4 |
50-100 | 8 |
100-150 | 16 |
150-200 | 13 |
200-250 | 6 |
250-300 | 3 |
Explanation:
Class Interval | Frequency (fi ) | Class Marks (xi) | (fi xi) |
---|---|---|---|
0-50 | 4 | 25 | 100 |
50-100 | 8 | 75 | 600 |
100-150 | 16 | 125 | 2000 |
150-200 | 13 | 175 | 2275 |
200-250 | 6 | 225 | 1350 |
250-300 | 3 | 275 | 825 |
N = Σfi = 50 | (fi xi) =7150 |
Explanation:
Thus,
Mean = katex is not defined 7150/50
= 143
Explanation:
Daily Expenditure (in ₹ ) | No. of Households (fi) | Mid-value ( xi) | fi × xi |
---|---|---|---|
100-150 | 4 | 125 | 500 |
150-200 | 5 | 175 | 875 |
200-250 | 12 | 225 | 2700 |
250-300 | 2 | 275 | 550 |
300-350 | 2 | 325 | 650 |
Σxi =25 | Σxi fi = 5275 |
Explanation:
katex is not defined
Hence, Mean = 211
Chapter No. | Chapter Name |
---|---|
Chapter 1 | Real Numbers |
Chapter 2 | Polynomials |
Chapter 3 | Pair of Linear Equations in Two Variable |
Chapter 4 | Quadratic Equations |
Chapter 5 | Arithmetic Progressions |
Chapter 6 | Triangles |
Chapter 7 | Coordinate Geometry |
Chapter 8 | Introduction to Trigonometry |
Chapter 9 | Some Applications of Trigonometry |
Chapter 10 | Circles |
Chapter 11 | Areas Related to Circle |
Chapter 12 | Surface Areas and Volumes |
Chapter 13 | Statistics |
Chapter 14 | Probability |
Chapter Wise Important Questions for CBSE Board Class 10 Maths |
---|
Real Numbers |
Polynomials |
Pair of Linear Equations in Two Variables |
Quadratic Equations |
Arithmetic Progressions |
Triangles |
Coordinate Geometry |
Introduction to Trigonometry |
Some Applications of Trigonometry |
Circles |
Areas Related to Circles |
Surface Areas and Volumes |
Statistics |
Probability |
CBSE Important Questions Class 10
ICSE Important Questions Class 10
CBSE Important Questions Class 10
ICSE Important Questions Class 10