Ajar contains a mixture of 10 black paperclips, 8 red paperclips, and 2 white paperclips all the same size. determine the probability of choosing either a red, black, or white ball in one draw

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?