a,b,c,d,e sitting in a row what is the probability that a & b sitting adjacent.
Choose the correct option.
A) 1/5 B) 2/5 C) 3/5 D) 4/5 E) 6/5
total number of arrangement is= 5!= 120   Favorable event i.e a and b can be arranged in 2! and the remaining can be arranged in 4! since ab can be in any of the four positions.   so 4!*2!/5! = 2/5   ANSWER:2/5
<result>B</result>
a,b,c,d,e sitting in a row what is the probability that a & b sitting adjacent.