Question

the telephone lines serving an airline reservation office are all busy about 60% of the time. if you and a friend must both complete calls to this office, what is the probability that a total of four tries will be necessary for both of you to get through?

Answer 1

Answer: 16%

Step-by-step explanation:

1. 60% not working = 40% working

2. 40% ^ 2, or 40% x 40% = 16%