Calvin bought 6 pounds of fertilizer for his yard. he used 1and 2/3 pounds for his backyard and 1 and7/9 pounds for his front yard. how much fertilizer is left?

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?