Internet Service Providers (ISP) Need to Resolve Customer Problems as Quickly

Multiple Choice

Internet service providers (ISP) need to resolve customer problems as quickly as possible. For one ISP, past data indicates that the likelihood is .80 that customer calls
Regarding Internet service interruptions are resolved within one hour. Out of the next 10
Customer calls about interrupted service, the probability that exactly 7 will be resolved
Within one hour is

A) 0.2013.
B) 0.8791.
C) 0.7897.
D) 0.3452.
E) 0.1209.