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, 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 S1 gets the previously allotted seat R1 , and NONE of the remaining students gets the seat previously allotted to him/her is
(A) 3/40 (B) 1/8 (C)7/40 (D) 1/5
