Seven friends A, B, C, D, E, F and G are sitting in a row facing South. B and…
2023
Seven friends A, B, C, D, E, F and G are sitting in a row facing South. B and F are not sitting together. C is sitting second to the left of D . A is not sitting with C . D is sitting fourth to the right of E . A and B are not sitting together. Only E is sitting between F and G . G is sitting second to the left of one who is sitting second to the left of A . Name two persons who are sitting at the extreme ends?
- A.
EandG - B.
CandD - C.
AandB - D.
AandF
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Correct answer: D
Work out positions (left→right indices 0..6). From the clue D is fourth to the right of E we get D = E + 4 . From C is second to the left of D → C = D - 2 = E + 2 . From G is second to the left of one who is second to the left of A' we get G = A - 4 . Because E must be between F and G (i.e. the three consecutive seats F–E–G or G–E–F), the only arrangement that satisfies all constraints without violating the “not sitting together” conditions is: Positions (left → right): 0 — F 1 — E 2 — G 3 — C 4 — B 5 — D 6 — A This satisfies every clue (E between F & G; D = E+4; C = D-2; G = A-4; B and F not adjacent; A not with C; A and B not together). Thus the two persons at the extreme ends are F (left end) and A (right end) — i.e. option (4) A and F .