Direction : Read the given information carefully and answer the given…
2021
Direction : Read the given information carefully and answer the given questions based on it.:
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.
Who among the following sit second from left end of the row and with how much experience?
- A.
E, 12yr
- B.
U, 12yr
- C.
B, 7yr
- D.
E, 2yr
- E.
None of these
Attempted by 1 students.
Show answer & explanation
Correct answer: D
Concept
In a linear seating puzzle, fix the most constrained clue first, then layer the remaining clues onto it. Two ideas drive this puzzle: (1) a gap clue "X persons sit between P and Q" means their positions differ by exactly X+1; (2) for a row facing NORTH, each person's right hand points east, so reading the row left-to-right, "to the right" means a higher seat number and "to the left" means a lower seat number.
Application
Number the seats 1 (left end) to 7 (right end). Vowel-named persons are A, E and U; each must have an even experience (2, 6 or 12) and must avoid seats 1, 4 and 7.
"Three persons sit between S and the one with 23 yr" forces their seats to differ by 4. "One person sits between S and A" forces S and A to differ by 2. Testing the valid pairings, S sits at seat 5, the 23-yr person at seat 1, and A at seat 3.
"Persons to the right of A equal persons to the left of the one with 2.5 × A's experience." A has 6 yr, so 2.5 × 6 = 15 yr, which is S. Persons right of A (seat 3) = 4; persons left of S (seat 5) = 4. The count matches, confirming A at seat 3 and S at seat 5.
"The least-experienced person (2 yr) sits second to the left of D." Placing D and counting two seats lower fixes D at seat 4 and the 2-yr person at seat 2. Since vowels avoid seats 1/4/7 and need even years, the 2-yr seat-2 person is the vowel E.
"B is neither the most experienced nor adjacent to S, and every neighbour of B is more experienced than B." An interior seat would give B two neighbours that both out-rank it, but no interior placement satisfies all earlier clues; the only seat that works is the right end, where B (7 yr) has a single neighbour — and that neighbour is more experienced, satisfying the condition. So B takes the right end with 7 yr, and the adjacent seat holds 12 yr.
U is not the least experienced, so U takes seat 6 with 12 yr; the remaining vowel A keeps seat 3 with 6 yr; V fills seat 1 with 23 yr; and seat 4 (D) holds the leftover 19 yr.
Final arrangement (left to right)
Seat | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
Person | V | E | A | D | S | U | B |
Experience | 23 | 2 | 6 | 19 | 15 | 12 | 7 |
Cross-check
Seat 2 (second from the left end) holds E with 2 yr of experience. Re-test the clues: B (7 yr) is not the maximum and is not next to S ✔; every vowel sits off the ends and the middle with even years ✔; the 2-yr person is two seats left of D ✔. Hence the person second from the left end is E with 2 yr of experience.