Geometry

Question Analysis
This question involves analyzing a Venn Diagram to calculate the probability of a specific compound event.
The main focus is on correctly identifying the region in the Venn Diagram that represents customers buying cookies and chocolate bars but not chips, and then computing the probability based on the number of customers in that region and the total number of customers.

Key Concept Explanation
The probability of an event is determined by the ratio of the number of favorable outcomes to the total number of outcomes.
In this case, the “K and B only” region represents the favorable outcomes, and the sum of all regions in the Venn Diagram gives the total number of outcomes.

Step - by - Step Solution
Identify the number of favorable outcomes: The “K and B only” region has 11 customers, which are the ones buying cookies and chocolate bars but not chips.
Calculate the total number of customers: Add up all the numbers in the Venn Diagram: