: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 <p>

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 <p>