P + Q equals P is the brother of Q; P - Q equals P is the mother of Q ...
Understanding the Relationships:
To decode the relationships represented by the symbols used in the question:
- P + Q: P is the brother of Q.
- P - Q: P is the mother of Q.
- P * Q: P is the sister of Q.
Objective:
We need to determine which option indicates that M is the maternal uncle of R.
Analyzing the Options:
- Option a) M + K + R:
- M is the brother of K, K is the brother/sister of R.
- Here, M could be an uncle, but not specifically maternal.
- Option b) M - R + K:
- M is the mother of R, and R is the mother/brother of K.
- This does not establish M as an uncle.
- Option c) M + K - R:
- M is the brother of K, and K is the mother of R.
- This means M is the maternal uncle of R because K, being R's mother, makes M her brother.
- Option d) M + K * R:
- M is the brother of K, and K is the sister of R.
- This shows M as a maternal uncle but does not confirm the maternal link as clearly.
Conclusion:
The correct answer is Option c) M + K - R because it clearly establishes that M is the brother of K (R's mother), thus making M a maternal uncle of R.
P + Q equals P is the brother of Q; P - Q equals P is the mother of Q ...
M + K - R
Because:
So M is the mother’s brother of R ⇒ maternal uncle.