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The question is followed by two statements," I and II. Mark the answer :

A carton of books weighs $70$ pounds. A truck carrying cartons of books loses $30 \%$ of its contents in an accident. How Many cartons were on the truck before the accident ?

1. The weight of the cartons left on the truck is $7 / 3$ times the weight of those that were lost.
2. The difference between the weight of those that remained on the truck and those that were lost is $3,360$ pounds.

1. If the question can be answered by using one of the statements alone, but cannot be answered using the other statement alone.
2. If the question can be answered by using either statement alone.
3. If the question can be answered by using both statements together, but cannot be answered using either statement alone.
4. If the question cannot be answered even by using both statements together.

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