Tanmayi wants to raise 175 for the school fundraiser. she has raised 120 so far how much more does she need to read her goal

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?