Rajani has a box with 6 marbles numbered from 1 to 6 on each of them. She picks a marble from it without seeing. What is the probability that the marble picked has the number 3 on it?

• A.  \[\frac{1}{6}\]                    
• B.         \[\frac{2}{3}\] 
• C.   \[\frac{3}{4}\]                                 
• D.         \[\frac{1}{4}\]