Statements:
All ambulance are fire engine.
Some train are fire engine.
Some bus are train.
Conclusions:
I. Some bus are fire engine.
II. Some train are ambulance.
III. Some train are bus.
Some train are fire engine (I) + Some train are bus (I) ⇒ No conclusion. Hence, conclusion I will not follow. All ambulance are fire engine (A) + Some train are fire engine (I) ⇒ No conclusion. Hence, conclusion II will also not follow. Some bus are train (I) ⇒ conversion ⇒ Some train are bus(I). Hence, conclusion III will follow.
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