GATE DA Quantitative Aptitude Previous Year Questions (PYQs): Syllabus, Unit-wise Weightage and Study Order

    GATE DA Quantitative Aptitude: 2 units and 7 chapters, a study order by exam weight and 0 practice questions.

    Units in GATE DA Quantitative Aptitude

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    One Solved Question from Each Quantitative Aptitude Chapter

    Question 1 · Quantitative Aptitude MCQ
    The number of patients per shift consulting Dr. Gita in her past shifts is shown in the figure. If the amount she earns is ₹ , what is the average amount (in ₹) she has earned per shift in the past shifts?

    Note: The figure shown is representative.

    20 40 30 10 0 10 20 30 40 50 5 6 7 8 Number of patients per shift (X) Number of shifts
    1. A.

      6,100

    2. B.

      6,300

    3. C.

      6,000

    4. D.

      6,500

    Correct Answer:

    A

    Step-by-Step Solution

    Key idea: This is a weighted average and linear transformation question, recognisable because it gives a frequency distribution (bar chart) and asks for the average of a linear function of the variable.

    Step 1: Calculate the total number of patients across all shifts. From the chart: (5 20) + (6 40) + (7 30) + (8 10) = 100 + 240 + 210 + 80 = 630.

    Step 2: Calculate the average number of patients per shift, \bar{X}. \bar{X} = 630 / 100 = 6.3.

    Step 3: Apply the linear transformation for earnings. The average earnings per shift is 1000(\bar{X} - 0.2).

    Step 4: Substitute \bar{X}: 1000(6.3 - 0.2) = 1000(6.1) = 6100.

    Answer: A

    chapter
    GATE DA Quantitative Aptitude Previous Year Questions (PYQs): Syllabus, Unit-wise Weightage and Study Order

    GATE DA Quantitative Aptitude: 2 units and 7 chapters, a study order by exam weight and 0 practice questions.

    A question from this chapter

    Question 1
    The number of patients per shift consulting Dr. Gita in her past shifts is shown in the figure. If the amount she earns is ₹ , what is the average amount (in ₹) she has earned per shift in the past shifts?

    Note: The figure shown is representative.

    20 40 30 10 0 10 20 30 40 50 5 6 7 8 Number of patients per shift (X) Number of shifts
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