Question
Statements: All cans are vessels.
>Some vessels are jars. All jars are containers. Some containers are drums. Conclusions: I. Some containers are not vessels. II. Some vessels are cans. III. All drums may be containers. IV. Some vessels are drums . In each of the questions below are given four statements followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of given conclusions logically follows from the given statements disregarding commonly known facts.Solution
Some vessels are jars (I) + All jars are containers (A) = Some vessels are containers (I). ⇒ conversion ⇒ Some containers are vessels (I). Hence, conclusion I will not follow. All cans are vessels = (A) ⇒ conversion ⇒ Some vessels are cans (I). Hence, conclusion II will follow. Some containers are drums (I) ⇒ Probable conclusion ⇒ All drums may be containers (A). Hence, conclusion III will also follow. I + A = I, I + I = No conclusion. Hence, conclusion IV will not follow. Alternate method - 
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