Introduction to Data Interpretation
Direction: Study the following bar-diagram carefully and answer the questions. The bar graph given below shows the foreign exchange reserves of a country (in million US $) from 1991-1992 to 1998 - 1999.
- Ratio of the sum of foreign exchange reserves during the years 1991-92, 1992-93, 1993-94 to that during the years 1995-96, 1996-97, 1997-98 is
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According to given bar graph , we have
Sum of foreign exchange reserves during the years 1991-92, 1992-93, 1993-94 = 2640 + 3720 + 2520 = 8880
Sum of foreign exchange reserves during the years 1995-96, 1996-97, 1997-98 = 3120 + 4320 + 5040 = 12480
Required ratio = Sum of foreign exchange reserves during the years 1991-92, 1992-93, 1993-94 : Sum of foreign exchange reserves during the years 1995-96, 1996-97, 1997-98Correct Option: C
According to given bar graph , we have
Sum of foreign exchange reserves during the years 1991-92, 1992-93, 1993-94 = 2640 + 3720 + 2520 = 8880
Sum of foreign exchange reserves during the years 1995-96, 1996-97, 1997-98 = 3120 + 4320 + 5040 = 12480
Required ratio = Sum of foreign exchange reserves during the years 1991-92, 1992-93, 1993-94 : Sum of foreign exchange reserves during the years 1995-96, 1996-97, 1997-98
∴ Required ratio = 8880 : 12480 = 37 : 52
- The percentage increase in the foreign exchange reserves in 1997-98 over 1993-94 is
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As per the given bar graph ,
The foreign exchange reserves in 1997-98 = 5040 million
The foreign exchange reserves in 1993-94 = 2520 million
Total change = 5040 - 2520Percentage increase = Total change × 100 The foreign exchange reserves in 1993-94
Correct Option: A
As per the given bar graph ,
The foreign exchange reserves in 1997-98 = 5040 million
The foreign exchange reserves in 1993-94 = 2520 million
Total change = 5040 - 2520Percentage increase = Total change × 100 The foreign exchange reserves in 1993-94 Percentage increase = 2520 × 100 = 100% 2520
- The foreign exchange reserves in 1996-97 were approximately what percent of the average foreign exchange reserves over the period under review?
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According to given bar graph , we have
The foreign exchange reserves in 1996-97 = 4320 million
Average foreign exchange reserves in all given years = 3480 millionRequired percent = The foreign exchange reserves in 1996-97 × 100 Average foreign exchange reserves in all given years
Correct Option: D
According to given bar graph , we have
The foreign exchange reserves in 1996-97 = 4320 million
Average foreign exchange reserves in all given years = 3480 millionRequired percent = The foreign exchange reserves in 1996-97 × 100 Average foreign exchange reserves in all given years Required percent = 4320 × 100 ≈ 124% 3480
- The ratio of the number of years, in which the foreign exchange reserves are above the average reserves, to those in which the reserves are below the average reserves is
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On the basis of given graph in question ,
Sum of foreign exchange reserve = 2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120
Number of years = 8Average foreign exchange reserve = (2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120) million dollar 8 Average foreign exchange reserve = 27840 = 3480 million dollar 8
Correct Option: C
On the basis of given graph in question ,
Sum of foreign exchange reserve = 2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120
Number of years = 8Average foreign exchange reserve = (2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120) million dollar 8 Average foreign exchange reserve = 27840 = 3480 million dollar 8
Number of years, in which the foreign exchange reserves above average value = 3
Number of years, in which the foreign exchange reserves below average value = 5
Required ratio = Number of years, in which the foreign exchange reserves above average value : Number of years, in which the foreign exchange reserves below average value
∴ Required ratio = 3 : 5
Direction: Following table gives details about the percentage change of the population in a particular town for given yea$ Go through the chart given and answer the questions that follow :
- What was the percentage increase in population of the town from 2005 to 2008?
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According to given bar graph , we have
Population of the town in year 2005 = 6%
Population of the town in year 2006 = 3%Single equivalent percentage increase for 2005 and 2006 = 
6 + 3 + 6 × 3 
% 100
Single equivalent percentage increase for 2005 and 2006 = 9.18%
Similarly,Single equivalent percentage increase for 9.18% and 4% = 9.18 + 4 + 9.18 × 4 % 100
Single equivalent percentage increase for 9.18% and 4% = 13.18 + 0.3672 ≈ 13.55%
Correct Option: C
According to given bar graph , we have
Population of the town in year 2005 = 6%
Population of the town in year 2006 = 3%Single equivalent percentage increase for 2005 and 2006 = 6 + 3 + 6 × 3 % 100
Single equivalent percentage increase for 2005 and 2006 = 9.18%
Similarly,Single equivalent percentage increase for 9.18% and 4% = 9.18 + 4 + 9.18 × 4 % 100
Single equivalent percentage increase for 9.18% and 4% = 13.18 + 0.3672 ≈ 13.55%Single equivalent percentage increase for 13.55% and 8% = 13.55 + 8 + 13.55 × 8 % 100
Single equivalent percentage increase for 13.55% and 8% = 21.55 + 1.08 ≈ 22.63%
