The sixth in a series of six guidebooks on minimum course content for second-year algebra, this booklet presents an introduction to sequences, series, permutation, combinations, and probability. Included are arithmetic and geometric progressions and problems solved by counting and factorials. Overall course goals are specified, a course outline is provided, performance objectives are listed, and text references keyed to the performance objectives are included. Pre- and posttests are also given, together with answer keys. (JP)