Out of 32 costumes for the school play 15 in to be altered(shortened or taken in) of those 32, 12 need to be shortened and 20 need to be taken in what is the probability that at randomly selected costume needs to be shortened and taken in

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.