Ahmad picked up a toy with a mass of 7/12 kilograms. Then picked up another of 1/12 kilograms. What's the total Write your answer as a fraction in simplest form

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?