Conclusions:
I. Some Apples are not Oranges.
II. Some Oranges being Pears is not a possibility.
Statements:
From Statement I. All Oranges are Bananas (A) + Some Bananas are Pears (I) → No conclusion. Hence conclusion I does not follow. All Oranges are Bananas (A) + Some Bananas are Pears (I) → Probable conclusion → Some Oranges may not be Pears (I). Hence conclusion II follows. From Statement II. A few Oranges are Apples (I) → Conversion → Some Apples are Oranges (I). Hence conclusion I does not follow. 100% Pears are Apples (A) + [A few Oranges are Apples (I) → Conversion] → Some Apples are Oranges (I) → Probable conclusion → Some Oranges may not be Pears (I). Hence conclusion II follows. From Statement III. Only Bananas are Oranges → All Oranges are Bananas and Oranges can have negative relation with anyone. Hence both conclusion I and II follows. From Statement IV. Some Pears are Oranges (I) + [All Apples are Oranges (A) → Conversion] → Some Oranges are Apples (I) → No conclusion. Hence conclusion I does not follow. Some Pears are Oranges (I) → Conversion → Some Oranges are Pears (I). Hence conclusion II does not follow.
If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
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