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JEE Main 2012 Mathematics question

MathematicsProbabilityJEE Main 2012

If six students, including two particular students A and B, stand in a row, then the probability that A and B are separated with one student in between them is

Answer: (2)

Solution

Positions (i, i + 2) for A, B: 4 choices, ×2 orders, ×4! for the rest:

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Question ID VK-103624