MCQ practice · SSC General Mathematics Board questions · Chapter 17: Statistics
The range of a dataset is 67 and its highest value is 85. What is the lowest value?
Think it through first, then pick an option.
- a 17
- b 18
- c 19
- d 20
Answer and explanation
Correct answer: c 19
From range = (85 − lowest) + 1 = 67 the lowest is 85 − 67 + 1 = 19.
Why the other options are wrong
- a 17: Subtracting once more from 85 − 67 gives 17; the range formula adds 1, it does not take 1 away.
- b 18: 18 = 85 − 67 leaves out the + 1 of range = (highest − lowest) + 1.
- d 20: 20 comes from adding 2; only 1 is added.
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