The band is selling 50 hats for a fundrasier. each hat is being sold for $12. the hats cost a total of $400. if they sell all the hats , how much money will be raised by the band? use the four-step plan.

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?