# Data Interpretation - Table Charts - Discussion

Discussion Forum : Table Charts - Table Chart 3 (Q.No. 1)
Directions to Solve

The following table gives the percentage of marks obtained by seven students in six different subjects in an examination.

The Numbers in the Brackets give the Maximum Marks in Each Subject.

 Student Subject (Max. Marks) Maths Chemistry Physics Geography History Computer Science (150) (130) (120) (100) (60) (40) Ayush 90 50 90 60 70 80 Aman 100 80 80 40 80 70 Sajal 90 60 70 70 90 70 Rohit 80 65 80 80 60 60 Muskan 80 65 85 95 50 90 Tanvi 70 75 65 85 40 60 Tarun 65 35 50 77 80 80

1.
What are the average marks obtained by all the seven students in Physics? (rounded off to two digit after decimal)
77.26
89.14
91.37
96.11
Explanation:

Average marks obtained in Physics by all the seven students

 = 1 x [ (90% of 120) + (80% of 120) + (70% of 120) 7
+ (80% of 120) + (85% of 120) + (65% of 120) + (50% of 120) ]
 = 1 x [ (90 + 80 + 70 + 80 + 85 + 65 + 50)% of 120 ] 7
 = 1 x [ 520% of 120 ] 7
 = 624 7
= 89.14.

Discussion:
49 comments Page 3 of 5.

Samsam said:   6 years ago
@Akshata.

It's written 'percentage of marks' not just marks and yes 90% of 120 is not 90 but they have taken " % of 120" as common and grouped the percentage marks together for addition in the second step.

Sunaki said:   6 years ago
Thanks everyone. This discussion was helpful.

Akshata said:   6 years ago
90% of 120 is 108.

How can 90 came?

Saurabh gupta said:   6 years ago
@All.

There is a big mistake in the question. That is, all the marks obtained by a student (Not the marks percentage) but in the answer, they are using them as percentage marks! How? Explain me clearly.

Shubham said:   6 years ago
The correct answer should be 74.29 as per average rule.

Shashank Rawat said:   7 years ago
How can it be possible, max marks of history & com-science are less than the marks obtained by the students?

Abc said:   7 years ago
@Sanjay.

It is given in the question that table gives percentage of marks.

Sanjay Kumar said:   7 years ago
In question, it is not given anywhere that the marks are in %. Maximum marks (Subject) is only mentioned. So the solution must be 520/7 = 74.28.

Fareen Khan said:   7 years ago
Because the actual marks obtained by students are not given, marks are given in (%) and Ayush got 90 (%) marks out of 120 marks.

So we need to calculate 90(%) of 120 to get the marks obtained by Ayush in physics.

Karishma said:   8 years ago
Why we are taking 90% of 120?