Acarpenter has a wooden stick that is 84 centimeters long. she cuts of 25% from the end of the stick. then she cuts the remaining stick into 6 equal pieces. what is the length of each piece?

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?