Bar graph
Direction: Study the following graph carefully to answer the questions that follow : Number of students (in thousand) enrolled in 3 different districts in 6 different years.
 What was the approximate average number of students enrolled in District A over all the years together?

View Hint View Answer Discuss in Forum
Required average = Sum of total number of students enrolled in District A in overall the years Total number of years
Correct Option: B
From above given Bar graph , we can see that
Number of students enrolled in District A in
years 2005 = 3000 students
years 2006 = 5000 students
years 2007 = 6000 students
years 2008 = 8000 students
years 2009 = 7000 students
years 2010 = 5000 studentsRequired average = Sum of total number of students enrolled in District A in overall the years Total number of years Required average = 3000 + 5000 + 6000 + 8000 + 7000 + 5000 6 Required average = 1000 x 34 = 5666 6
 Total number of students enrolled in District A and District B together in the year 2010 was what percentage of the total number of students enrolled in District A in the year 2008?

View Hint View Answer Discuss in Forum
Required percentage = Total number of students enrolled in District A and District B in the year 2010 x 100% Total number of students enrolled in District A in the year 2008
Correct Option: A
Given in the graph :
Number of students enrolled in District A in the year 2010 = 5000
Number of students enrolled in District B in the year 2010 = 7000
Total number of students enrolled in District A in the year 2008 = 8000Required percentage = Total number of students enrolled in District A and District B in the year 2010 x 100% Total number of students enrolled in District A in the year 2008 Required percentage = ( 5000 + 7000 ) x 100 8000 Required percentage = 12000 = 150 % 80
 What was the percentage increase in enrollment in the number of students in District C in year 2007 as compared to that in the previous year?

View Hint View Answer Discuss in Forum
∵ Required Percentage = Total change in enrollment x 100 Total number of students in District C in year 2006 Correct Option: D
As per given graph, We have
Number of students in District C in year 2007 = 9
Number of students in District C in year 2006 = 8
Total change in enrollment = Students in District C in year 2007  Students in District Cin year 2006
Total change in enrollment = 9  8 = 1∵ Required Percentage = Total change in enrollment x 100 Total number of students in District C in year 2006 = 1 x 100 = 12.5 % 8
 In which year was the number of students enrolled in all the three districts together the second highest?

View Hint View Answer Discuss in Forum
Total number of students as per given, we can draw as below.
Correct Option: C
From given graph , we can see that
Since , In 2008 year is the number of students enrolled in all the given 3 districts together the second highest.
Hence required Answer will be 2008 year .
 What was the difference between the number of students enrolled in all the 3 districts together in the year 2008 and the number of students enrolled in District B over all the years together?

View Hint View Answer Discuss in Forum
Required Difference = Students in district B over all the years ( 2005 to 2010 ) − Students in 2008 in all 3 districts
Correct Option: A
Students enrolled in 2008 in all three districts ( A + B + C ) = 8000 + 6000 + 7000 = 21000
Students enrolled in district B over all the years ( 2005 to 2010 ) = 5000 + 4000 + 7000 + 6000 + 4000 + 7000 = 33000
∴ Required Difference = Students in district B over all the years ( 2005 to 2010 ) − Students in 2008 in all 3 districts
∴ Required Difference = 33000 − 21000 = 12000