Ms. Martin had $89 to
spend on children's
books for the library. If
books cost $9.50 each.
how many books could
she buy and still have $7
left over?

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?