Find the probability in a group of 10 students sitting in a row , two of them
always sit next to each other	Choose the correct choice from the following answers.
A) 0.5  B) 0.4  C) 0.3  D) 0.2  E) 0.1
Assume that these 2 students are 1 and then u can sit is 9! and these 2 students can sit by 2 ways then total ways are 9!*2   and the probability is 9!*2/10! = 1/5= 
<gadget id="calculator">1/5</gadget>
<output>1/5 = around 0.2</output>
0.2   ANSWER:0.2
<result>D</result>
Find the probability in a group of 10 students sitting in a row , two of them
always sit next to each other