Question

Can you explain how you would estimate the number of books sold in 1989? Number of children in six different classes are given below. Represent the data on a bar graph.
Class Number of Children Fifth 135 Sixth 120 Seventh 95 Eighth 100 Ninth 90 Tenth
(a) How would you choose a scale? (b) Answer the following questions:
(i) Which class has the maximum number of children? And the minimum? (ii) Find the ratio of students of class sixth to the students of class eight.​

Answer 1

Given info:

Number of children in six different classes are given in the attachment

Represent the data in to bar graph answer the following questions ?

Explanation:

See the above attachment

Number of children in class V = 135

Number of children in class VI = 120

Number of children in class VII = 95

Number of children in class VIII = 100

Number of children in class IX = 90

Number of children in class X = 80

Total number of children = 620

1) Scale :-

Taking scale depends upon the given values in the given data .

For convenience we take 1 cm = 10 units for related given data

On X-axis taking classes and taking on Y-axis number of children

On taking Y-axis 1 cm = 10 units

2)

Class V has maximum number of children (135)

and Class X has minimum number of children (80)

3)

Number of children in class VI = 120

Number of children in class VIII = 100

Ratio = 120:100

⇛ 120/100

⇛ 12/10

⇛ 6/5

⇛ 6:5

Answer:-

The ratio of the children on class VI to VIII = 6:5

In bar graph the width of the all bars are equal.

In bar graph the lengths of the bars Proportional to the frequency of the corresponding class.