Draw an expression tree for the algebraic expression (a + b) * (c - d ).

Weekly Notes #2) Week 2 Notes mutually Theorems f exclusive ) • PCA , U Az ) =p (A Dtp CAD A A 2 The Union Ai and Az is to the addition of ' Ai Az of both which equal the universal . and , of equal set • If A = A U U for then Az U .. . Am and Ain Aj sum¥0tion itj , Ptt ) =§s PGD If the sets are collectively exhaustive and exclusive then the mutually , probability set A is to the all the of equal 1 at of of parts of A , starting at and ending M . • : PE ] ( probability measure ) Satisfies - P[0]=O There are 0 elements within an empty Sample - P[A '] = - P [A ] space ASetd its com