Question 1023994
a. 0.35, or 35%

b. 0.65, or 65% of the customers say they will return.  Of this, 0.35 or 35% say it's good.  So the proportion is 0.35/0.65  = 7/13, or 53.85%

c.  0.49, or 49% of the customers say it is good.  Of this, 0.35 or 35% they will return.  So the proportion is 0.35/0.49 = 5/7, or 71.42%.

d.  Part a is simply joint probability, whereas b and c are conditional probabilities, and require evaluation of marginal probabilities.