Certain number of persons are sitting in a linear row from the west to the east end and face in the north direction. Information regarding only few persons is known.
B sits immediate to the left of A. I sits second to the right of B.
Three persons sit between B and C.
G sits fifth to the right of C. Thus, case 1a is invalid.
F sits fifth to the left of C.
H sits immediate to the left of G.
Only four persons sit to the left of F.
I sits exactly in the middle of the row.
Therefore, the final arrangement is:
Thus, 15 persons are sitting in a row.
Five persons sit towrads the right side of C.
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