There are many possibilities. An example is
.
Answer: 0.60
Step-by-step explanation:
Given: Mean : 
Standard deviation : 
The formula to calculate z is given by :-

For x= 20 minutes

The P Value =
Hence, the probability that a randomly selected shopper will spend less than 20 minutes in the store= 0.60
Answer:
Umm….. I really don’t know……..
Step-by-step explanation:
Sorry…..
A) 2/4 b) 6/8 c) 18/20. Is that what you are asking for?