A wood board 59 inches long is cut into three parts. The first part is twice the length of the second part. The third part is 5 less than the second part. How long
are the three parts?

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?