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The question is followed by two statements I and II.

Mark

  1. if the question can be answered by any one of the statements alone, but cannot be answered by 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 the statements together, but cannot be answered by using either statement alone.
  4. if the question cannot be answered even by using both the statements together.

Mr Mendel grew 100 flowering plants from black seeds and white seeds, each seed giving rise to one plant. A plant gives flowers of only one colour. From a black seed comes a plant giving red or blue flowers. From a white seed comes a plant giving red or white flowers. How many black seeds were used by Mr Mendel?

  1. The number of plants with white flowers was $10.$
  2. The number of plants with red flowers was $70.$
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black seed comes a plant giving red or blue flowers

white seed comes a plant giving red or white flowers.

The number of plants with white flowers was 10---these are from white seeds obvious

But the number of plants with red flowers was 70 ---- these are from white or black seeds we cannot tell

Ans D) Question cannot be Answered even using both statements

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