Introduction to Data Interpretation
Direction: Study the following Histogram and answer the following questions.
 The total number of students involved in the data is

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According to given bar graph , we have
Number of students who obtained marks 010 = 4
Number of students who obtained marks 1020 = 6
Number of students who obtained marks 2030 = 10
Number of students who obtained marks 3040 = 8
Number of students who obtained marks 4050 = 5Correct Option: A
According to given bar graph , we have
Number of students who obtained marks 010 = 4
Number of students who obtained marks 1020 = 6
Number of students who obtained marks 2030 = 10
Number of students who obtained marks 3040 = 8
Number of students who obtained marks 4050 = 5
Required total number of students = 4 + 6 + 10 + 8 + 5 = 33
Direction: The Histogram shown the marks of 50 students in an examination. Examine the diagram and answer the questions. [Marks are given in integers only].
 What percent of students did obtain marks above 60?

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On the basis of given graph in question ,
Number of students obtaining above 60 marks = 35
Total number of students = 1 + 4 + 2 + 8 + 10 + 12 + 5 + 8 = 50∴ Required percentage = Number of students obtaining above 60 marks × 100 Total number of students
Correct Option: C
On the basis of given graph in question ,
Number of students obtaining above 60 marks = 35
Total number of students = 1 + 4 + 2 + 8 + 10 + 12 + 5 + 8 = 50∴ Required percentage = Number of students obtaining above 60 marks × 100 Total number of students Required percentage = 35 × 100 = 70% 50
 How many students obtained more than 39 but below 60?

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According to given bar graph , we have
Number of students who marks obtained range 4050 = 2
Number of students who marks obtained range 5060 = 8
Required number of students = 2 + 8 = 10Correct Option: C
According to given bar graph , we have
Number of students who marks obtained range 4050 = 2
Number of students who marks obtained range 5060 = 8
Required number of students = 2 + 8 = 10
Therefore , the number of students who marks obtained more than 39 but below 60 is 10.
Direction: Study the bargraph and answer the following questions.
 In which wage group, is the amount of money needed to pay the monthly wages the highest?

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According to given bar graph , we have
In wage group of 1400 – 1500 ,
Number of worker = 9∴ Mean monthly wage = 1400 + 1500 = 1450 2
Correct Option: A
According to given bar graph , we have
In wage group of 1400 – 1500 ,
Number of worker = 9∴ Mean monthly wage = 1400 + 1500 = 1450 2
Required Amount = 1450 × 9 = ₹ 13050
 The total amount of money (approximately) needed to pay the monthly wages of all the workers is

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As per the given bar graph , we have
Required amount = Number of worker × mean monthly wages
Required amount = 3 × 1050 + 8 × 1150 + 5 × 1250 + 4 × 1350 + 9 × 1450 + 8 × 1550 + 6 × 1650 + 7 × 1750
Required amount = 3150 + 9200 + 6250 + 5400 + 13050 + 12400 + 9900 + 12250Correct Option: B
As per the given bar graph , we have
Required amount = Number of worker × mean monthly wages
Required amount = 3 × 1050 + 8 × 1150 + 5 × 1250 + 4 × 1350 + 9 × 1450 + 8 × 1550 + 6 × 1650 + 7 × 1750
Required amount = 3150 + 9200 + 6250 + 5400 + 13050 + 12400 + 9900 + 12250 = ₹ 71600
Hence , the total amount of money needed to pay the monthly wages of all the workers is ₹ 71600 .