a11 a12 a13 b11 b12 b13 Let A a21 a22 a23 | and B b21 b22 b23 be given. Which of the following statement or a31 a32 a33 b31 b32 b33 statements are absolutely correct? I. If AB = 0, then A = 0 or B = 0. II. (A+B)² = A²+2AB + B² dir. a11 a12 a13 III. For k e R, kA = | ka21 ka ka23 a31 a32 a 33 IV. For k + 0, if A-1 exists, then (kA)-1 = }A-1. V. Trace(B) = b11 + b2 + b33 (a) II and II (b) I, II and V (c) II and III (d) IV and V (e) IV

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.