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Drawing Double Bar Graphs

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Question

What is the difference between the Overall average marks of class A and class B in the 9 subjects?

A

24

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B

16

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C

20

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D

12

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Solution

The correct option is B
16

The data from the graph can be tabulated as :

Sum of average marks of class A = 60 + 70 + 63 + 90 + 70 + 42 + 77 + 54 + 60 = 586

Sum of average marks of class B = 68 + 76 + 54 + 80 + 72 + 48 + 61 + 65 + 78 = 602

Difference between overall average marks = 602 - 586 = 16

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Similar questions

Following graph shows the comparison between Average marks obtained by students of class A and class B in 9 subjects.

Which Subject has the closest margin of average marks when both classes are compared?
Here the horizontal axis is x axis which represents 2classes and vertical axis is y axis which represents marks. The scale is x-axis 1cm = 2classes and y axis 1cm = 10 marks.

Q. Students from 3 classes attend a mathematics exam.
The average marks in class I is 83.
The average marks in class II is 76
The average marks in class III is 85.
The average marks of all students in classes I and II is 79. The average marks of all students in classes II and III is 81. What is the average for all the three classes?

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. If the average marks of whole class is

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then what is the average marks of the girls?

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. The average marks of the boys in the class is

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Q. Average marks of the students of Class A is of 68. If Class B consisting of students having an average 72 joins them, then the average marks of A & B becomes 69.33. If Class C consisting of a few students having an average mark of 65 joins Class A, then average marks of A & C becomes 66.2. What will be the combined average mark of class B and class C?___

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