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Indian Institute of Foreign Trade 2015 Solved Paper
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© examsnet.com
Question : 5
Total: 124
During the essay writing stage of MBA admission process in a reputed B-School, each group consists of 10 students. In one such group, two students are batchmates from the same IIT department. Assuming that the students are sitting in a row, the number of ways in which the students can sit so that the two batchmates are not sitting next to each other, is:
3540340
2874590
2903040
None of the above
Validate
Solution:
(c) Number of ways that two batchmates are not sitting next to each other = total number of ways in which 10
Students can sit – the number of ways in which two batchmates sit together
= 10! – 9! × 2 = 10 × 9! – 9! × 2
= 9! × 8 = 2903040
© examsnet.com
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