GATE EE 2015 Set 1 — Question 10
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General Aptitude → Quantitative Aptitude → Data Interpretation (Bar, Pie, Graphs, Tables)
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Question
The number of students in a class who have answered correctly, wrongly, or not attempted each question in an exam, are listed in the table below. The marks for each question are also listed. There is no negative or partial marking.
What is the average of the marks obtained by the class in the examination?
| Q No. | Marks | Answered Correctly | Answered Wrongly | Not Attempted |
|---|---|---|---|---|
| 1 | 2 | 21 | 17 | 6 |
| 2 | 3 | 15 | 27 | 2 |
| 3 | 1 | 11 | 29 | 4 |
| 4 | 2 | 23 | 18 | 3 |
| 5 | 5 | 31 | 12 | 1 |
Correct answer
(C) 6.795
Solution
1.First, determine the total number of students in the class. Summing the columns for any question (Correct + Wrong + Not Attempted) gives: students.
2.Calculate the total marks obtained by the entire class by summing the marks for each question multiplied by the number of correct answers:
- Q1:
- Q2:
- Q3:
- Q4:
- Q5:
3.Calculate the average marks: .
Rounding to three decimal places, we get 6.795.Continue learning with Success Tracker
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