Researchers asked 300 families whether or not they were homeowners and how many cars they had. Their responses are summarized in the following table. (a) What percentage of the families are not homeowners?
(b) What percentage of the families have no car or one car?

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?