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Table Charts

Study the following table and answer the questions.

Classification of 100 Students Based on the Marks Obtained by them in Physics and Chemistry in an Examination.

Subject Marks out of 50
40 and above 30 and above 20 and above 10 and above 0 and above
Physics9328092100
Chemistry4216681100
Average (Aggregate)7277387100
Q1:

The percentage of number of students getting at least 60% marks in Chemistry over those getting at least 40% marks in aggregate, is approximately?

A 21%

B 27%

C 29%

D 31%

ANS:C - 29%

Number of students getting at least 60% marks in Chemistry     = Number of students getting 30 and above marks in Chemistry     = 21. Number of students getting at least 40% marks in aggregate     = Number of students getting 20 and above marks in aggregate     = 73.

Required percentage
= ( 21 x 100 ) %
73
= 28.77%
~= 29%.



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