JEE Advanced 2018 - 2

There are five students $S_{1}$ , $S_{2}$ , $S_{3}$ , $S_{4}$ and $S_{5}$ in a music class and for them there are five seats $R_{1}$ , $R_{2}$ , $R_{3}$ , $R_{4}$ and $R_{5}$ arranged in a row, where initially the seat $R_{i}$ is allotted to the student $S_{i},i = 1, 2, 3, 4, 5$ . But, on the examination day, the five students are randomly allotted the five seats.

The probability that, on the examination day, the student $S_{1}$ gets the previously allotted seat $R_{1}$ and NONE of the remaining students gets the seat previously allotted to him/her is