Line Charts - General Aptitude

In a school the periodical examination are held every second month. In a session during April 2001 - March 2002, a student of Class IX appeared for each of the periodical exams. The aggregate marks obtained by him in each perodical exam are represented in the line-graph given below.

Marks Obtained by student in Six Periodical Held in Every Two Months During the Year in the Session 2001 - 2002.

Maximum Total Marks in each Periodical Exam = 500

Q1:

In which periodical exams did the student obtain the highest percentage increase in marks over the previous periodical exams ?

A June, 01

B August, 01

C Oct, 01

D Dec, 01

ANS:C - Oct, 01

Percentage increase in marks in various periodical exams compared to the previous exams are:

For Jun 01 = [ (365 - 360) x 100 ] % = 1.39%.
360
For Aug 01 = [ (370 - 365) x 100 ] % = 1.37%.
365
For Oct 01 = [ (385 - 370) x 100 ] % = 4.05%.
370
For Dec 01 = [ (400 - 385) x 100 ] % = 3.90%.
385
For Feb 02 = [ (404 - 400) x 100 ] % = 1.25%.
400
Clearly, highest percentage increase in marks is in Oct 01.