Mr. McGee is the manager of the washer and dryer department of an appliance store. He wants to estimate the probability that a customer who comes to his department will buy a washer or dryer. He collected the following data during one week: $177$ customers came to his department, $88$ purchased washers, $64$ purchased dryers, and $69$ did not make a purchase.

1. Make a two-way table. Using Mr. McGee’s data, what is the probability that the next customer who comes to his department will purchase a washer or a dryer?

   Hint (a):

   	purchased washer	did not purchase  washer
   purchased dryer	purchased washer row 1 blank	did not purchase washer row 1 blank	right edge top $\mathbf{64}$
   did not purchase dryer	purchased washer row 2 blank	did not purchase washer row 2$\mathbf{69}$	right edge bottom blank
   	bottom edge left$\mathbf{88}$	bottom edge right blank	$\mathbf{177}$

   Answer (a):

   $61$%. Make sure you know how to calculate this from your two-way table.

2. Mr. McGee promises his sales people a bonus if they can increase the probability that the customers who buy washers also buy dryers. What is the probability that if a customer bought a washer, he or she also bought a dryer?

   Hint (b):

   How many people purchased washers?
   Of those who purchased washers, how many bought dryers?

   Answer (b):

   $\frac{44}{88}$