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    Question

    Seven persons M, N, O, P, Q, R and S sit in a linear row

    but not necessarily in the same order. Each of them faces towards the north. R sits second from an extreme end of the row. Three persons sit between R and Q. N sits immediate right of Q. P sits third to the right of O. P sits neither at the end of the row nor adjacent to N. M sits to the left of S. Who among the following sits at extreme left end of the row?
    A O Correct Answer Incorrect Answer
    B M Correct Answer Incorrect Answer
    C S Correct Answer Incorrect Answer
    D N Correct Answer Incorrect Answer

    Solution

    R sits second from an extreme end of the row. Three persons sit between R and Q. N sits immediate right of Q.R sits either second from the extreme left end or extreme right end.Q sits either fourth to the right or left of R. ____ R ____ _____ ____ Q N ……. CASE 1 .____ Q N ____ ____ R ____ ……. CASE 2. P sits third to the right of O. P sits neither at the end of the row nor adjacent to N. M sits to the left of S. P sits second to the right of R and O sits immediate left of R. M sits immediate right of R. S sits immediate right of P. O R M P S Q N ……. CASE 1. Case 2 will get discarded . ____ Q N ____ ____ R ____ ……. CASE 2. Final arrangement O R M P S Q N

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