A rocket is divided into three sections. The top section is one sixth the length of the bottom section . The middle section is one half the length of the bottom section. The total length of the rocket is 180ft. Find the length of the top section.

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.