Directions for questions 69-71: In each of the 3 questions below, are given four statements followed
by four conclusions numbered I, II, III, IV. You have to take the given statements to be true if they seem
to be at variance from commonly known facts. Read all the conclusions and then decide which of the
given conclusions logically follows from the given statements disregarding commonly known facts.
Statements:
Some doctors are lawyers.
All teachers are lawyers.
Some engineers are lawyers.
All engineers are businessmen.
Conclusions:
I. Some teachers are doctors.
II. Some businessmen are lawyers.
III. Some businessmen are teachers.
IV. Some lawyers are teachers.
🎥 Video solution / Text Solution of this question is given below:
From statements:
Teachers ⊆ Lawyers
Doctors ∩ Lawyers (some common)
Engineers ∩ Lawyers (some common)
Engineers ⊆ Businessmen
Check conclusions:
I. Some teachers are doctors → Not necessarily.
No direct link between teachers & doctors. Does not follow.
II. Some businessmen are lawyers → TRUE.
Engineers ⊆ Businessmen AND some engineers are lawyers →
⇒ Some businessmen are lawyers. ✔️
III. Some businessmen are teachers → FALSE.
No connection between teachers & businessmen.
IV. Some lawyers are teachers → TRUE.
All teachers ⊆ lawyers. ✔️