Lesson 2 of 5 · 3-set counting / max-min region values
Exactly k
Venn-based Reasoning · for IPMAT Indore, IPMAT Rohtak and JIPMAT
The exam method
- E-counts. three newspapers read 100 + 70 + 90 = 260 times by 200 people with 20 reading all three → E2 + 2E3 = 60 → E2 = 20, E1 = 160.
Worked examples
Example 3Easy
200 people, newspapers 100, 70, 90, all three 20, everyone reads one. Exactly one?
Solution: 160. E2 + 2 × 20 = 60 → E2 = 20; E1 = 200 − 20 − 20.
Picked from the 3-set counting / max-min region values note for this micro-concept automatically. The whole note: 3-set counting / max-min region values.