A gardener uses 4 plots of land to plant 5 fruit trees each. On each of the fruit trees, there are 3 pieces of fruit. If the gardener picks 17 fruits in total, how many pieces of fruit are there left on the
land?

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.