If six persons sit in a row, then the probability that three particular persons are always together is -. Choose the correct option:	A) 1/5	B) 1/7	C) 1/9	D) 1/2	E) 2/7
3!4! Required probability = 3!4!/6! = 1/5   1/5NSWER 1/5
<result>A</result>
If six persons sit in a row, then the probability that three particular persons are always together is -.