Aseries of books has 20 volumes, each with 600 pages. what is the total number of pages in the series?

Need on this one asap im almost done with this subject

Which of the following is the shape of a cross section of the figure shown below

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18 }, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.