objects or elements1) A= {1, 2, 3, 4} : tabularmethod2) B= { {x1 {x4 , {xZ} : rule method*Countable ... ^k q^n-k{(np)^k over k! e^-npIn summary,{{pmatrix{n#k}p^k q^n-k={1over SQRT{2 npq} e^{- (k-np)^2over2 ... Text book: Probabilistic Methods of Signal and System Analysis (3 Ed.)George R. Cooper and Clare D