IBPS RRB Officer Prelims 09 Sep 2017 Shift 1 Paper

(i) All tables are desks → UniversalAffirmative (A–type).
(ii) Some controls are rules → ParticularAffirmative (I–type).
(iii) No chair is a table → UniversalNegative (E–type).
(iv) Some chairs are not tables →Particular Negative (O–type).
(5) No chair is a table.
All tables are desks.
E + A ⇒O1–type of Conclusion“Some desks are not chairs.”
All tables are desks.
No desk is a paper.
A + E ⇒ E–type of Conclusion“No table is a paper”.
Venn diagrams of “Some desksare not chairs” :
Venn diagrams I and II supportthe Conclusion II.