Which of the following statement is sufficient to answer the question? How is Bhavana(girl) related to Sathish? Statements: I: Bhavana’s mother is Rajyam
Both I and II are sufficient
Analyzing Blood Relation Statements for Sufficiency
The question asks how Bhavana is related to Sathish. We are given two statements and need to determine if one or both are sufficient to answer this question.
Analyzing Statement I: Bhavana’s mother is Rajyam
Statement I tells us that Rajyam is the mother of Bhavana. From this statement alone, we know about Bhavana's immediate family line (her mother). However, this statement provides no information about Sathish. We do not know if Sathish is related to Bhavana or Rajyam based solely on Statement I.
Therefore, Statement I by itself is not sufficient to determine the relationship between Bhavana and Sathish.
Analyzing Statement II: Rajyam’s son is Satish
Statement II tells us that Sathish is the son of Rajyam. From this statement alone, we know about Sathish's immediate family line (his mother). However, this statement provides no information about Bhavana. We do not know if Bhavana is related to Sathish or Rajyam based solely on Statement II.
Therefore, Statement II by itself is not sufficient to determine the relationship between Bhavana and Sathish.
Combining Statement I and Statement II
Now, let's consider both statements together:
- From Statement I: Bhavana’s mother is Rajyam.
- From Statement II: Rajyam’s son is Sathish.
Both statements indicate that Rajyam is the mother of two individuals: Bhavana and Sathish. If two people have the same mother, they are siblings. Therefore, Bhavana and Sathish are siblings. Since Bhavana is mentioned as a girl in the question, she is Sathish's sister.
By combining both statements, we can definitively determine the relationship between Bhavana and Sathish. Bhavana is Sathish's sister.
Conclusion on Statement Sufficiency
Based on the analysis:
- Statement I alone is not sufficient.
- Statement II alone is not sufficient.
- Both Statement I and Statement II combined are sufficient.
Thus, both statements together are necessary and sufficient to answer the question about how Bhavana is related to Sathish.
Revision Table: Evaluating Statement Sufficiency
| Statement(s) Considered | Information Gained | Sufficient to Answer "How is Bhavana related to Sathish?" |
|---|---|---|
| Statement I only | Rajyam is Bhavana's mother. | No |
| Statement II only | Rajyam is Sathish's son. | No |
| Statement I and Statement II combined | Rajyam is Bhavana's mother, and Rajyam is Sathish's son. | Yes (Bhavana is Sathish's sister) |
Additional Information on Blood Relation Problems
Blood relation questions test your ability to understand and interpret relationships within a family structure based on given information. These problems often appear in logical reasoning sections of competitive exams. Key things to remember:
- Carefully read each statement and build a family tree or diagram if helpful.
- Identify the individuals involved and the relationships described (e.g., parent-child, sibling, grandparent-grandchild).
- For data sufficiency questions, analyze each statement independently first, then combine them if necessary.
- Determine if the combined information provides a unique and unambiguous relationship between the two target individuals.
- Pay attention to gender hints if provided (like "Bhavana (girl)").
Understanding common relationships and being able to deduce indirect relationships is crucial for solving blood relation and data sufficiency problems effectively.
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