. For i = 1, 2, 3, 4, let Ti denote the event that the students Si and Si+1 do
For i = 1, 2, 3, 4, let Ti denote the event that the students Si and Si+1 do NOT sit adjacent to each other on the day of the examination. Then, the probability of the event T1 ∩ T2 ∩ T3 ∩ T4 is
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