Samuel has a collection of toy cars. his favorites are the 27 red ones which make up 60%, percent of his collection. how many toy cars does samuel have?

Calculate the mean value (expected value) of the following discrete variable x (10 points): x = 0, 1, 2, 3, 4, 5, 6 p(x) = 0.2, 0.2, 0.15, 0.15, 0.15, 0.1, 0.05