J
  <p>

a. the sum of 2 draws from box A 
J 
  <p>

b. the sum of 2 draws from box B 
J 
  <p>

c. the sum of 4 draws from box A 
J 
  <p>

d. the sum of 4 draws from box B 
J 
  <p>

e. none of the above 
J