### Home > CCAA8 > Chapter 10 Unit 11 > Lesson CCA: 10.1.1 > Problem10-16

10-16.

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?

 purchasedwasher 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 $\mathbf{177}$

$61$%. 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?

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

$\frac{44}{88}$