For any two event A, B the Probability of A union B equals to probability of A added to probability of B minus probability of A intersection B. P (A∪B) = P(A) + P(B) – P(A∩B) Proof :- Suppose, the simple events in A∩B are γ1, …

Elementary Matrix In mathematics, an elementary matrix is nothing but a matrix obtained by performing only one elementary transformation. They can be denoted as follows: Elementary matrix obtained by interchanging i, jth rows of I is denoted by Eij. Elementary matrix obtained by multiplying ith row …