Question

A sample of 275 shoppers at a large suburban mall were asked two questions: (1) Did you see a television ad for
the sale at department store X during the past 2 weeks? (2) Did you shop at department store X during the past
2 weeks? The responses to the questions are summarized in the table. What is the probability that a randomly
selected shopper from the 275 questioned did not shop at department store X?

Answer 1

Data is lacking.

Answer 2

What is the probability of the shoppers did not see the ad and did not shop at department store X?