For the school fundraiser, mr. brown's class collected an average of $17 each day. about how much money did the class collect during the month of january?

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?