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Seven people, A, V, C, L, E, K and N, are sitting in a row, facing north. Only four people sit to the left of E. Only four people sit to the right of L. Only one person sits between K and L. V sits to the immediate left of A. C does not sit to the left of N. Who sits third to the right of C?
A
L
E
K
A
Fix the anchor points (E and L) first. Since only four people are to the left of E, E must be at position 5. Since only four are to the right of L, L must be at position 3.
Fix the anchor points (E and L) first. Since only four people are to the left of E, E must be at position 5. Since only four are to the right of L, L must be at position 3.
Establish the row layout
There are 7 positions (1-2-3-4-5-6-7). Only 4 to the left of E means E is at index 5. Only 4 to the right of L means L is at index 3.
Place K and V-A pair
Only one person is between K and L. L is at 3, so K must be at 1 (since 5 is occupied by E). V is immediate left of A; the only adjacent empty spots are 6 and 7. Thus, V=6, A=7.
Final positioning
Remaining people are C and N. Positions left are 2 and 4. The rule C is not to the left of N means C must be to the right of N. Thus, N=2, C=4. Row: K, N, L, C, E, V, A.
Evaluate the target
We need the person 3rd to the right of C. C is at position 4. 1st right is E (5), 2nd right is V (6), 3rd right is A (7).
B: L is in position 3, which is to the left of C. C: E is the 1st person to the right of C, not the 3rd. D: K is to the left of C.
A is correct because the final arrangement is K(1), N(2), L(3), C(4), E(5), V(6), A(7), placing A at the 3rd position to the right of C.
In row problems, always prioritize 'anchors' (statements defining specific positions like 'Only 4 to the left') to minimize trial and error.
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