SSC CGL Reasoning · Chapter Test
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Formula Reference Sheet
This chapter
Region logic & counting
| One contains another | e.g. all dogs are animals → Dogs inside Animals |
|---|---|
| Partial overlap | some shared, some not → intersecting circles |
| Disjoint | nothing shared → separate circles |
| Two-set union | |A∪B| = |A| + |B| − |A∩B| |
| Only A | |A| − |A∩B| (subtract the overlap) |
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