Question

1. Shoppers at a local department store were asked to complete a survey of their shopping experience. The results are shown in the table below:

Satisfied with Service Not Satisfied with Service Totals
Made a Purchase: 130 494 624
Did Not Make a Purchase: 715 183 898
Totals: 845 677 1522

a. What is the probability that a shopper selected at random made a purchase?








b. What are the odds that a shopper selected at random was satisfied with the service?

Answer 1

Looking at the table totals:
1. What is the total number of shoppers?
2. What is the total who made a purchase?
The probability that a shopper selected at random made a purchase is
\[P(made\ a\ purchase)=\frac{total\ who\ made\ a\ purchase}{total\ number\ of\ shoppers}\]