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Each question is followed by two statements, I and II. Mark the answer:
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.
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?
I. The number of plants with white flowers was 10.
II.The number of plants with red flowers was 70.
1
2
3
4
- We know there are 100 plants: black seeds produce red or blue flowers, and white seeds produce red or white flowers.
- Statement I: The number of plants with white flowers was 10.
- 10 plants have white flowers, so they must come from white seeds.
- Unable to determine exact count of black seeds without more information.
- Statement II: The number of plants with red flowers was 70.
- 70 plants had red flowers, either from black or white seeds.
- Using both statements together:
- From I, 10 plants have white flowers and come from white seeds.
- From II, 70 plants have red flowers. Combined white and red (100 - 10 white flowers) comes to 90.
- Uncertainty remains due to overlapping possibilities for red flower count among black and white seeds.
- Using both statements together, an exact number of black seeds cannot be determined due to overlapping color possibilities.
Answer: Option 4-4: The question cannot be answered even by using both statements together.
By: Sandeep Dubey ProfileResourcesReport error
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