MCQ practice · SSC General Mathematics Board questions · Chapter 17: Statistics
The highest value of a dataset is 78 and the range is 54. What is the lowest value?
Think it through first, then pick an option.
- a 25
- b 26
- c 35
- d 36
Answer and explanation
Correct answer: a 25
From range = (78 − lowest) + 1 = 54 the lowest is 78 − 54 + 1 = 25.
Why the other options are wrong
- b 26: 26 comes from adding 2; only 1 is added.
- c 35: 35 does not come from the formula; 78 − 54 = 24 and only 1 is added to it.
- d 36: 36 would need 12 added to 24; the formula adds only 1.
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