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Statistics: Mean and Median

Quantitative Aptitude · Maths Bookwise · Data & Reasoning

Useful for: SSC CGL

BOOK-GUIDED ORIGINAL SSC MATHS PRACTICE — Statistics: Mean and Median

FOUNDATION

For ordered odd-numbered data, median is the middle observation.

METHOD

Identify the quantities given, choose the exact relationship, calculate in the same unit, then check the answer against the question.

WORKED EXAMPLE 1

Find the median of 34, 38, 42, 46, 50.

There are 5 already ordered observations; position (5+1)/2=3. Median=42.

WORKED EXAMPLE 2

Find the median of 53, 70, 87, 104, 121, 138, 155.

There are 7 already ordered observations; position (7+1)/2=4. Median=104.

IMPORTANT EXCEPTION / COMMON TRAP

Sort observations before finding the median.

QUICK REVISION

For ordered odd-numbered data, median is the middle observation.

SEE MORE: https://study.kundali-iq.com/ssc-maths/statistics/

For complete timed maths practice, use SSC CGL Test Series → New Maths 100 Mixed Sets or Chapter-wise sets. These are independent original questions, not copied previous-year questions.

Practice MCQs

  1. Find the median of 34, 38, 42, 46, 50.

    1. 42
    2. 46
    3. 40
    4. 44

    Read chapter notes · Similar questions

    Show answer

    Answer: (a) 42. There are 5 already ordered observations; position (5+1)/2=3. Median=42.

  2. Find the median of 53, 70, 87, 104, 121, 138, 155.

    1. 104
    2. 110
    3. 116
    4. 98

    Read chapter notes · Similar questions

    Show answer

    Answer: (a) 104. There are 7 already ordered observations; position (7+1)/2=4. Median=104.

  3. Find the median of 40, 57, 74, 91, 108, 125, 142.

    1. 85
    2. 103
    3. 91
    4. 97

    Read chapter notes · Similar questions

    Show answer

    Answer: (c) 91. There are 7 already ordered observations; position (7+1)/2=4. Median=91.

  4. Find the median of 20, 33, 46, 59, 72.

    1. 49
    2. 52
    3. 43
    4. 46

    Read chapter notes · Similar questions

    Show answer

    Answer: (d) 46. There are 5 already ordered observations; position (5+1)/2=3. Median=46.

  5. Find the mean of the numbers 4, 6, 8, 10 and 12

    1. 10
    2. 6
    3. 8
    4. 9

    Read chapter notes · Similar questions

    Show answer

    Answer: (c) 8. Mean = (4 + 6 + 8 + 10 + 12) / 5 = 40/5 = 8.

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Notes and questions are written by Kundali IQ for practice. They are not official papers; always check the latest official notification for the syllabus and pattern.