A family of 7 queue to get ice cream from a an ice cream van. What is the probability that the father will be standing right in front of the mother in the queue?
Pick one
A) 5%
B) 10%
C) 15%
D) 21%
E) 25%
Possible Sitting position is 7! = 120   Father standing next to mother is 7 Combination 2   =7!/2!(7-2)!   =5040/2(120)   =5040/240= 
<gadget id="calculator">5040/240</gadget>
<output>21</output>
21   Answer= 21%
<result>D</result>
A family of 7 queue to get ice cream from a an ice cream van. What is the probability that the father will be standing right in front of the mother in the queue?