20 people with two sisters among them want to sit around a round table such that the two sisters are exactly separated by one person sitting in between them. Find the probability.  Select:
A) 1/19	B) 2/29	C) 3/29	D) 4/29	E) 5/29
20 people in which 2 sisters are there and the condition is that 2 sisters should be seperated by 1 person   (s1 p s2) be 1 set   then 20-3= 
<gadget id="calculator">20-3</gadget>
<output>17</output>
&gt; 17 persons + 1 set= 18   18 can be arranged in 17! ways bcz it is circular permutuation   the 2 sis can be arranged in 2! ways   and the p place can be filled in 18 ways   and the total permutations are 19!   probability is = (2!*18*17!)/(19!)   = 2/19   ANSWER:2/29
<result>B</result>
20 people with two sisters among them want to sit around a round table such that the two sisters are exactly separated by one person sitting in between them. Find the probability.