Seven persons S, E, V, B, A, D and U sit in a row facing north and they all work in a company with different working experience of 15yr, 7yr, 2yr, 23yr, 19yr, 6yr and 12yr. All the information is not necessarily in the same order as given.

The persons with vowel name have experience of even number year and neither sits at the end nor at exactly middle of the row. Three persons sit between S and the one having 23yr experience. One person sits between S and A. The number of persons sits to the right of A is same as the number of persons sits to the left of the one having experience 2.5 times of A. B neither have highest year experience nor sits adjacent to S. The person having least experience sits second to the left of D. U does not have least experience. The neighbors of B have more experience than B.

Which among the following is correct combination?

The correct option is U-12.

Step-by-Step Explanation:

1. Identify the Given Information:

• Seven Persons: S, E, V, B, A, D, U facing North in a single row (positions 1 to 7 from left to right).

• Experiences (in years): 2, 6, 7, 12, 15, 19, 23.

• Vowels: E, A, U (3 persons).

• Consonants: S, V, B, D (4 persons).

2. Vowel Rules:

• Persons with vowel names (E, A, U) have even years of experience. The available even experience values are 2, 6, and 12. Therefore, {E, A, U} = {2, 6, 12} in some order.

• Vowels cannot sit at the extreme ends (positions 1 and 7) nor in the exact middle (position 4). Thus, vowels must occupy positions 2, 3, 5, or 6.

3. Analyze Experience and Position Rules for A:

• Since A is a vowel, A's experience must be 2, 6, or 12.

• The person with 2.5 times the experience of A exists in the given set. Let's check:

- If A = 2: 2.5 × 2 = 5 (Not in the set)

- If A = 6: 2.5 × 6 = 15 (Valid! 15 is in the set)

- If A = 12: 2.5 × 12 = 30 (Not in the set)

Hence, A's experience = 6 years, and the person with 15 years experience is connected to A's position.

• "The number of persons sitting to the right of A is the same as the number of persons sitting to the left of the one having 15 years experience." This means A and the person with 15 years experience are symmetrically placed from the ends of the row.

4. Determine Least Experience and Position of D:

• The least experience is 2 years.

• The person with least experience (2 yr) sits second to the left of D. So, the arrangement pattern is: (2 yr) _ D.

• U does not have the least experience, so U ≠ 2 yr. Since A = 6 yr, the person with 2 yr experience must be E.

• Thus, U's experience = 12 years.

5. Match with the Options:

• E has 2 years of experience (E-2).

• A has 6 years of experience (A-6).

• U has 12 years of experience (U-12).

Comparing with the given combinations, U-12 is the correct and accurate combination.