Introduction to Data Interpretation
Direction: Student strengths of a college in Arts, Science and Commerce from 20042005 to 20072008 session are shown in the following bar graph. Study the graph and answer the questions that follow.
 The ratio of average number of students in Science to the average number of students in Commerce is :

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According to given bar graph , we have
Total number of students in Science ⇒ 400 + 400 + 450 + 500 = 1750
Total number of students in Commerce ⇒ 200 + 250 + 300 + 250 = 1000
Number of given years = 4
Required ratio = Average number of students in Science : Average number of students in CommerceCorrect Option: B
According to given bar graph , we have
Total number of students in Science ⇒ 400 + 400 + 450 + 500 = 1750
Total number of students in Commerce ⇒ 200 + 250 + 300 + 250 = 1000
Number of given years = 4
Required ratio = Average number of students in Science : Average number of students in Commerce∴ Required ratio = 1750 : 1000 = 7 : 4 4 4
Direction: The bar graph shows the number of males and females (in crores) in India during 1951–1991. Read the graph and answer the following questions
 Assuming that the rate of increase in the total population in India during 19912001 remains the same as that was during the period 19811991, estimate the total population in India in 2001.

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From the given bar diagram , we see
Total population in 1981 = 35 + 33 = 68 crores
Total population in 1991 = 44 + 41 = 85 crores
Total increase = 85  68 = 17 croresPercentage increase = Total increase × 100 Total population in 1981 Percentage increase
=1700 = 25% 68
Total population in 2001 = 125% of 85 crores
Correct Option: B
From the given bar diagram , we see
Total population in 1981 = 35 + 33 = 68 crores
Total population in 1991 = 44 + 41 = 85 crores
Total increase = 85  68 = 17 croresPercentage increase = Total increase × 100 Total population in 1981 Percentage increase
=1700 = 25% 68
Total population in 2001 = 125% of 85 croresTotal population in 2001 = 85 × 125 crores 100
Total population in 2001 = 106.25 crores
 What is the ratio of the number of females in India in 1961 per thousand males to the number of males in India in 1991 per thousand females?

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As per the given bar graph , we have
Number of females in India in 1961 = 21 crores
Number of males in India in 1961 = 23 crores
Number of males in India in 1991 = 44 crores
Number of females in India in 1991 = 41 croresRequired ratio = 21 × 1000 : 44 × 1000 23 41
Correct Option: E
As per the given bar graph , we have
Number of females in India in 1961 = 21 crores
Number of males in India in 1961 = 23 crores
Number of males in India in 1991 = 44 crores
Number of females in India in 1991 = 41 croresRequired ratio = 21 × 1000 : 44 × 1000 23 41
Required ratio = 21 × 41 : 44 × 23
Required ratio = 861 : 1012
 What was the approximate number of males in India in 1971 per thousands females?

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According to given bar graph , we have
Number of males in India in 1971 = 28 Crores
Number of females in India in 1971 = 26 CroresNumber of men per thousand women in 1971 = Number of males in India in 1971 × 100 Number of females in India in 1971
Correct Option: C
According to given bar graph , we have
Number of males in India in 1971 = 28 Crores
Number of females in India in 1971 = 26 CroresNumber of men per thousand women in 1971 = Number of males in India in 1971 × 100 Number of females in India in 1971 Number of men per thousand women in 1971 = 28 × 100 ≈ 1077 26
 What was the approximate percentage of female population in India during 1991?

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On the basis of given graph in question ,
Total population in 1991 = (44 + 41) crores = 85 crores
Female population in 1991 = 41 crores∴ Required percent = Female population in 1991 × 100 Total population in 1991
Correct Option: A
On the basis of given graph in question ,
Total population in 1991 = (44 + 41) crores = 85 crores
Female population in 1991 = 41 crores∴ Required percent = Female population in 1991 × 100 Total population in 1991 ∴ Required percent = 41 × 100 ≈ 48.23% 85