In a queue that comprises of 7 students. Sam and Tom are in the queue, what is the probability that they will be standing next to each other in the queue?
Pick
A) 7%
B) 14%
C) 21%
D) 28%
E) 35%
Possible Sitting position is 7! = 120   Sam and Tom standing next to each other is 7 21%ombination 2   =7!/2!(7-2)!   =5040/2(120)   =5040/240= 
<gadget id="calculator">5040/240</gadget>
<output>21</output>
21   Answer= 21%
<result>C</result>
In a queue that comprises of 7 students. Sam and Tom are in the queue, what is the probability that they will be standing next to each other in the queue?