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All questions of Table Analysis for GMAT Exam

Directions: Study the following table chart and answer the questions.
Q. The number of students scoring less than 40% marks in aggregate is?
  • a)
    13
  • b)
    19
  • c)
    20
  • d)
    27
  • e)
    29
Correct answer is option 'D'. Can you explain this answer?

Rahul Kapoor answered
We have 40% of 50 = (40/100)x50 = 20
Therefore Required number
= Number of students scoring less than 20 marks in aggreagate
= 100 - Number of students scoring 20 and above marks in aggregate
= 100 - 73 = 27.

Directions: The following table gives the percentage of marks obtained by seven students in six different subjects in an examination.
The Numbers is the Brackets give the Maximum Marks in Each Subject.
Q. In which subject is the overall percentage the best?
  • a)
    Maths
  • b)
    Chemistry
  • c)
    Physics
  • d)
    History
  • e)
    English
Correct answer is option 'A'. Can you explain this answer?

BT Educators answered
Explanation: We shall find the overall percentage (for all the seven students) with respect to each subject. The overall percentage for any subject is equal to the average of percentages obtained by all the seven students since the maximum marks for any subject is the same for all the students. Therefore, overall percentage for:
Maths

Directions: Study the following table chart and answer the questions.
Q. The percentage of number of students getting at least 60% marks in Chemistry ove those getting at least 40% marks in aggregate, is approximately what according to the table chart?
  • a)
    21%
  • b)
    27%
  • c)
    29%
  • d)
    31%
  • e)
    28%
Correct answer is option 'C'. Can you explain this answer?

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 = (21/73)x100%
= 28.77% ≌ 29%.

Directions: The following table gives the percentage of marks obtained by seven students in six different subjects in an examination.
The Numbers is the Brackets give the Maximum Marks in Each Subject.
Q. What is the overall percentage of Tarun?
  • a)
    50%
  • b)
    52.55%
  • c)
    60%
  • d)
    63%
  • e)
    58%
Correct answer is option 'C'. Can you explain this answer?

Notes Wala answered
Aggregate marks obtained by Tarun
= [ (65% of 150) + (35% of 130) + (50% of 120) + ((77% of 100) + (80% of 60) + (80% of 40) ]
= [ 97.5 + 45.5 + 60 + 77 + 48 + 32 ]
= 360.
The maximum marks (of all the six subjects)
= (150 + 130 + 120 + 100 + 60 + 40)
= 600.
Therefore Overall percentage of Tarun = (360/600)x600 = 60%

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