MCQ practice · SSC General Mathematics Board questions · Chapter 17: Statistics
What is the median of the data above?
Think it through first, then pick an option.
- a 6
- b 7
- c 8
- d 9
Answer and explanation
Correct answer: b 7
Ordered 0, 4, 4, 6, 8, 9, 10, 15: (6 + 8)/2 = 7.
Why the other options are wrong
- a 6: In the sorted list 0, 4, 4, 6, 8, 9, 10, 15 the 6 is the 4th term; n is even, so the median is the mean of the 4th and 5th terms, 6 and 8, which is 7.
- c 8: 8 is the 5th term alone; the mean of the two middle terms is needed.
- d 9: 9 is the 6th term; the middle terms are the 4th and 5th, 6 and 8.
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