Probability
nProbability -
fraction or proportion of an outcome in a population
Example 1 - A, B, C, or D = 6 A's, 3 B's, 10 C's and 9 D's
Probability of A =
#
of AÕs
=
p(A) = 6
#
of possible outcomes
28
Example 2 - probability of tossing coin and getting heads = 1 = .50
2
