:6. Consider the box of diagram ? on page ? pf the test.  One
ticket is drawn at random out of the box.  The chance that the
ticket is black and has the number "1" written on it is

 a.  can't tell because color and number are not independent
 b.                 1/2 + 2/3
 c.                    1/3 
 d.                     0
 e.                 1/2 x 1/3