Practice Question - 14 (Venn Diagram) | 100 DILR Questions for CAT Preparation PDF Download

Ans: (d) 
Based on the given information, we can form the following Venn-diagram for ease of understanding: 

The conditions help us to further bifurcate the individuals based on their expertise.

Mridangam: A and B (condition 1); one out of F and G (condition 3)

Tabla: one out of A and B (condition 1); F and G (condition 3); D (condition 2)

Ghatam: D (condition 2)

Based on condition 4, we infer that 'I' and 'J' are either experts in Ghatam or Mridangam. However, condition 5 adds that 'I' is not an expert in Mridangam. This helps us definitively zero-in on 'I' as an expert in Ghatam. Since 'I' is a Ghatam expert, J is an expert in Mridangam and 'H' is an expert in Tabla [based on conditions 4 and 5]. Thus, we can depict our understanding so far as follows:

Mridangam [total: 5] - A and B (condition 1); one out of F and G (condition 3); J (condition 4 and 5); one out of C and E {remaining experts}
Tabla [total: 6] - one out of A and B (condition 1); F and G (condition 3); D (condition 2); H (condition 4 and 5); one out of C and E {remaining experts} 
Ghatam [total: 2] - D (condition 2); I (condition 4 and 5)
Thus, we observe that H is definitely an expert in tabla but not in either mridangam or ghatam. Hence, Option (d) is the correct answer.

Ans: (b)
Based on the given information, we can form the following Venn-diagram for ease of understanding: 

The conditions help us to further bifurcate the individuals based on their expertise.
Mridangam: A and B (condition 1); one out of F and G (condition 3)
Tabla: one out of A and B (condition 1); F and G (condition 3); D (condition 2)
Ghatam: D (condition 2)
Based on condition 4, we infer that 'I' and 'J' are either experts in Ghatam or Mridangam. However, condition 5 adds that 'I' is not an expert in Mridangam. This helps us definitively zero-in on 'I' as an expert in Ghatam. Since 'I' is a Ghatam expert, J is an expert in Mridangam and 'H' is an expert in Tabla [based on conditions 4 and 5]. Thus, we can depict our understanding so far as follows:

Mridangam [total: 5] - A and B (condition 1); one out of F and G (condition 3); J (condition 4 and 5); one out of C and E {remaining experts}
Tabla [total: 6] - one out of A and B (condition 1); F and G (condition 3); D (condition 2); H (condition 4 and 5); one out of C and E {remaining experts} 
Ghatam [total: 2] - D (condition 2); I (condition 4 and 5)
Thus, we observe that J is definitely an expert in mridangam but not in either tabla or ghatam. Hence, Option (b) is the correct answer.

Ans: (b)
Based on the given information, we can form the following Venn-diagram for ease of understanding: 

The conditions help us to further bifurcate the individuals based on their expertise.
Mridangam: A and B (condition 1); one out of F and G (condition 3)
Tabla: one out of A and B (condition 1); F and G (condition 3); D (condition 2)

Ghatam: D (condition 2)
Based on condition 4, we infer that 'I' and 'J' are either experts in Ghatam or Mridangam. However, condition 5 adds that 'I' is not an expert in Mridangam. This helps us definitively zero-in on 'I' as an expert in Ghatam. Since 'I' is a Ghatam expert, J is an expert in Mridangam and 'H' is an expert in Tabla [based on conditions 4 and 5]. Thus, we can depict our understanding so far as follows:

Mridangam [total: 5] - A and B (condition 1); one out of F and G (condition 3); J (condition 4 and 5); one out of C and E {remaining experts}
Tabla [total: 6] - one out of A and B (condition 1); F and G (condition 3); D (condition 2); H (condition 4 and 5); one out of C and E {remaining experts} 
Ghatam [total: 2] - D (condition 2); I (condition 4 and 5)
We observe that the pair C and E cannot have any musician who is an expert in both tabla and mridangam but not in ghatam. Hence, Option (b) is the correct answer.

Ans: (a)
Based on the given information, we can form the following Venn-diagram for ease of understanding: 

The conditions help us to further bifurcate the individuals based on their expertise.
Mridangam: A and B (condition 1); one out of F and G (condition 3)
Tabla: one out of A and B (condition 1); F and G (condition 3); D (condition 2)
Ghatam: D (condition 2)
Based on condition 4, we infer that 'I' and 'J' are either experts in Ghatam or Mridangam. However, condition 5 adds that 'I' is not an expert in Mridangam. This helps us definitively zero-in on 'I' as an expert in Ghatam. Since 'I' is a Ghatam expert, J is an expert in Mridangam and 'H' is an expert in Tabla [based on conditions 4 and 5]. Thus, we can depict our understanding so far as follows:

Mridangam [total: 5] - A and B (condition 1); one out of F and G (condition 3); J (condition 4 and 5); one out of C and E {remaining experts}

Tabla [total: 6] - one out of A and B (condition 1); F and G (condition 3); D (condition 2); H (condition 4 and 5); one out of C and E {remaining experts} 

Ghatam [total: 2] - D (condition 2); I (condition 4 and 5)

If C is an expert in Mridangam, E has to be an expert in Tabla. Additionally, if F is not an expert in Mridangam, he has to be an expert only in Tabla while G will be an expert in both Tabla and Mridangam.

Tabla [total: 6] - one out of A and B (condition 1); F and G (condition 3); D (condition 2); H (condition 4 and 5);  E {based on the condition given in the question}

Of these experts, A, B and G are experts of Mridangam and D is an expert of Ghatam as well. Thus, excluding these, we have  F, H and E who are the experts solely in Tabla. Thus, Option (a) is the correct answer.