Multiple choice

In each of the following questions, read the given statement and compare the Quantity I and Quantity II on its basis. (only quantity is to be considered) Quantity I : The average marks obtained by 3 departments is 848. If the average marks obtained by the students of physics department of 15 students is 64 and the average marks of the students of chemistry department of 12 students is 72. Find the average marks of the students of Maths department having 9 students. Quantity II : The average marks of four students in Mathematics is 68. Later it was found that, one of the students got 88 marks and due to error in marking he got 76. Find the actual average marks of the four students.

  1. Quantity : I > Quantity : II

  2. Quantity : I ≥ Quantity : II

  3. Quantity : I < Quantity : II

  4. Quantity : II ≥ Quantity : I

  5. Quantity I = Quantity II or relation can't be established
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A Correct answer
AI explanation

Let the maximum marks for one subject be 100, making the total maximum marks 500 across 5 subjects. Robin's total obtained marks are 72 percent of 500, which equals 360. Given the marks are in the ratio 10:9:8:7:6, let the scores be 10x, 9x, 8x, 7x, and 6x, so 40x equals 360 and x equals 9. The individual scores are 90, 81, 72, 63, and 54. Since the passing marks are 65, Robin passed in the 3 subjects where he scored 90, 81, and 72.

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