(i) A, B, C, D, E, F and G are sitting on a w | vedclass

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(A) $1$. Since all are facing East,the 'south end' is the bottom and the 'north end' is the top.$2$. $D$ is third from the south end. Let the position

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$AB$

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(A) $1$. Since all are facing East,the 'south end' is the bottom and the 'north end' is the top.$2$. $D$ is third from the south end. Let the positions from south to north be $1, 2, 3, 4, 5, 6, 7$.$3$. $D$ is at position $3$. $C$ is on the immediate right of $D$. Since they face East,the right of $D$ is towards the south. Thus,$C$ is at position $2$.$4$. $B$ is at an extreme end and has $E$ as his neighbour. $G$ is between $E$ and $F$. This implies the sequence $B-E-G-F$ must occupy the remaining spots.$5$. Placing $B$ at the extreme north (position $7$),we get: $7: B, 6: E, 5: G, 4: F, 3: D, 2: C, 1: A$.$6$. Thus,$A$ and $B$ are at the extreme ends.

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