Carson want to display 6 photos and 16 drawings he owns in groups, with each group having the same combinations of photos and drawings and none left over. What is the greatest number of groups Carson can display?

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?