For inclusive class intervals like 10-19, 20-29, the true class boundaries are obtained by:
A. Subtracting 0.5 from lower limit and adding 0.5 to upper limit
B. Subtracting 0.5 from both limits
C. Leaving them unchanged
D. Adding 0.5 to both limits
Answer: Option A
Solution (By JKSSB Mock Tests)
Inclusive series have gaps; adjusting by half the gap (0.5) gives continuous boundaries: 9.5-19.5, 19.5-29.5, etc.
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