Nine people, A, B, C, D, E, F, G, H, and I, are sitting in a row facing south. E sits in the middle. Three people sit between E and G. Six people sit between G and B. Three people sit between B and A. F sits second to the right of A. I sits fourth to the left of F. I and E are not immediate neighbours. B and C are not neighbours. H sits to the right of D. Who is sitting fourth to the right of G?
E sits in the middle.
_ _ _ _ E(↓) _ _ _ _
Three people sit between E and G.
Here G is possible in two places which are given below in Case(i) and Case(ii).
Case(i) G(↓) _ _ _ E(↓) _ _ _ _
Case(ii) _ _ _ _ E(↓) _ _ _ G(↓)
Six people sit between G and B. Three people sit between B and A.
Case(i) G(↓) _ _ A(↓) E(↓) _ _ B(↓) _
Case(ii) _ B(↓) _ _ E(↓) A(↓) _ _ G(↓)
F sits second to the right of A. I sits fourth to the left of F.
Case(i) G(↓) F(↓) _ A(↓) E(↓) I(↓) _ B(↓) _
Case(ii) _ B(↓) _ F(↓) E(↓) A(↓) _ I(↓) G(↓)
I and E are not immediate neighbours.
The above given condition is not applicable in Case(i). So this case is eliminated.
Case(ii) _ B(↓) _ F(↓) E(↓) A(↓) _ I(↓) G(↓)
B and C are not neighbours. H sits to the right of D.
H(↓) B(↓) D(↓) F(↓) E(↓) A(↓) C(↓) I(↓) G(↓)
According to the above arrangement, E is sitting fourth to the right of G.
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