Discussion Forum



 

Jn a school the periodical examinations are held every second month. In a session during Apr. 2001 - Mar. 2002, a student of Class IX appeared for each of the periodical exams. The aggregate marks obtained by him in each periodical exam are represented in the line-graph given below. Study the graph and answer the questions based on it.

 

MARKS OBTAINED BY A STUDENT IN SIX PERIODICAL EXAMS HELD IN EVERY TWO MONTHS DURING THE YEAR IN THE SESSION 2001-02

linegraph-ex1.jpg

1)

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


A) Jun. 01

B) Aug. 01

C) Oct. 01

D) Dec. 01

E) Feb. 02

Answer:

Option C

Explanation:

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

For Jun. 01 = ( ( 365 - 360 ) / 360 ) X 100 % = 1.39%

For Aug. 01 = ( ( 370 - 365 ) / 365 ) X 100 % = 1.37%

For Oct. 01 = ( ( 385 - 370 ) / 370 ) X 100 % = 4.05%

For Dec. 01 = ( ( 400 - 385 ) / 385 ) X 100 % = 3.90%

For Feb. 02 = ( ( 405 - 400 ) / 400 ) X 100 % = 1.25%

Clearly, highest percentage increase in marks is in Oct. 01.