5.
If six students, including two particular students A and B, stand in a row, then the probability that A and R
are separated with one student in between them is :
Answers
Answered by
1
Answer:
4/15
Step-by-step explanation:
Consider, A,B,C where C is between A & B choice for C is
4
C
1
, A & B can interchange their places in 2 ways
A,B,C & other 3 students can stand in a row in 4! ways. So total number of ways to stand in a row such two A, B are seprated by one students in between them =4×2×4!
Number of ways to stand without restriction =6!
Probability =
6!
4×2×4!
=
6×5
4×2
=
15
4
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