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JEE Advanced 2018 Paper 1

PARAGRAPH “A”

There are five students S1,S2,S3,S4 and S5 in a music class and for them there are five seats R1,R2,R3,R4 and R5 arranged in a row, where initially the seat Ri is allotted to the student Si=1,2,3,4,5.But, on the examination day, the five students are randomly allotted the five seats.
(There are two questions based on PARAGRAPH “A”, the question given below )

Question : 54

Total: 54

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

[JEE Adv 2018 P1]

1
15
1
10
7
60
1
5

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