There are 5 students S
1, S
2, S
3, S
4, S
5 in a music class and for them there are 5 seats in a row. On examination day, all five students are randomly allotted the five seats.
What is the probability that no student is seated next to another student with a number that differs by 1?
Trying to seat them:
13524,14253,24135,24153, + their 66666 complements make 8.
35142,35241,35214, + their 66666 complements make 6.
14 out of 120 results in 14/120
i.e probability of 0.1167
Edited on May 11, 2019, 11:15 am
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