Checkout times in a Walmart store follow an exponential ...

[jwb375]

Checkout times in a Walmart store follow an exponential distribution with a mean time of 8 minutes. What is the probability that the checkout time for the next customer will be 6 minutes or less?
 
  A) 0.528
  B) 0.472
  C) 0.972
  D) 0.328

Question 2

The diagram which provides an intuitive understanding of the addition rule which computes the probability of the union of events is called a:
 
  A) plot diagram.
  B) scattered diagram.
  C) Venn diagram.
  D) tree diagram.

[recede]

Answer to Question 1

A

Answer to Question 2

C