Iift 2015 Question 33
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IIFT
Consider the case where batchmates are sitting together and then subtract those cases from total no. of cases.
When 10 students are arranged in a line, total arrangements possible are 10!
Now considering batchmates sitting together,
B1 B2 _ _ _ _ _ _ _ _
Then total arrangements possible are 9!*2!
Total ways = 10! - 9!*2!
9!*8 = 2903040