Statement:Â
All petrol are diesel.
Only a few petrol are coal.
Some diesel are kerosene. Â
Conclusion:
All coal being kerosene is a possibility. Â
All coal are diesel is a possibility.
All diesel can be petrol. Â
Some petrol are coal (I) → Conversion → Some coal are petrol (I) + All petrol are diesel (A) → Some coal are diesel (I) + Some diesel are kerosene (I) → Probable conclusion → All coal can be kerosene (I). Hence conclusion I follows. Some petrol are coal (I) → Conversion → Some coal are petrol (I) + All petrol are diesel (A) → Some coal are diesel (I) → Probable conclusion → All coal can be diesel (I). Hence conclusion II follows. All petrol are diesel (A) → Probable conclusion → All diesel can be petrol (I). Hence conclusion III follows. Alternate Method -
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