Question

A small software company has three customer service representative. After a week of observation, the supervisor of the customer service department determines that there is an 85% probability taht a customer service representative will be on the phone with a customer at any give time. What is the probability of all three representatives being on the phone at the same time?

Answer 1

To determine the probability across multiple items which are independent (the fact that one representative is on the phone has no affect on another being on the phone) we multiply the probabilities

So you would have
P=(.85)(.85)(.85)