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In a row of people all facing north, Shakshi is 11 th from the left end. Ravi is 12 th from the left end. Ravi is exactly between Shakshi and Ron. If Ron is 14 th from the right end of the row, how many people are there in the row?
25
26
27
28
26
In a row, if a person (Ravi) is exactly between two others (Shakshi and Ron), the number of people between any two of them is the same. Total = (Position of Shakshi + Position of Ron from Right - 1) + number of people between them, but simply use the middle position logic: Ravi is the midpoint.
In a row, if a person (Ravi) is exactly between two others (Shakshi and Ron), the number of people between any two of them is the same. Total = (Position of Shakshi + Position of Ron from Right - 1) + number of people between them, but simply use the middle position logic: Ravi is the midpoint.
Identify Positions
Shakshi is 11th from the left. Ravi is 12th from the left. Since Ravi is exactly between Shakshi and Ron, and he is immediately next to Shakshi, Ron must be at the 13th position from the left.
Calculate Total
We now know Ron's position is 13th from the left. The question states Ron is 14th from the right end. Using the formula: Total = (Position from Left) + (Position from Right) - 1, we get: 13 + 14 - 1 = 26.
A: 25 is incorrect as it assumes Ron is 12th or miscounts the indices. C: 27 results from failing to subtract the overlapping person. D: 28 ignores the exact middle constraint provided in the problem.
B is correct because Ron's position from the left is determined to be 13 based on the gap between Shakshi (11) and Ravi (12), and applying the rank formula (13 + 14 - 1) yields 26.
In seating arrangement problems, always verify the gap size. If A is at N and B is at N+1, they are adjacent; if a person is between them, check if that person is the midpoint of their indices.
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