1 2 3 4 5 6 7 8 9 10 11 12 13 14 A 14 B 14 C 14 D 14 E

West Bengal Mathematics

11. Statistics

1. Real Numbers
2. Laws of Indices
3. Graph
4. Co-ordinate Geometry: Distance Formula
5. Linear Simultaneous Equations
6. Properties of Parallelogram
7. Polynomial
8. Factorisation
9. Transversal and Mid-Point Theorem
10. Profit and Loss
11. Statistics
12. Theorems on Area
13. Construction: (Construction of a Parallelogram whose measurement of one angle is given and equal in area of a triangle)
14. Construction: (Construction of a triangle equal in area of a quadrilateral)
15. Area and Perimeter of Triangle and Quadrilateral Shaped Region
16. Circumference of Circle
17. Theorems on concurrence
18. Area of Circular Region
19. Co-ordinate Geometry: Internal and External Division of Straight Line Segment
20. Co-ordinate Geometry: Area of Triangular Region
21. Logarithm

Let us Work Out 11.1

1 2 3 4 5 6 7 8 A 8 B 8 C 8 D 8 E 9 A 9 B 9 C 9 D 9 E

Let us Work Out 11.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 A 14 B 14 C 14 D 14 E

Q. 11

I draw the

Class 9th West Bengal Mathematics 11. Statistics

Answer :

Making the class continuous.

Now, we will find the middle-class values

We can see that the middle-class value would have came same even if we didn’t find the continuous class.

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