Question

let $A=\begin{bmatrix} 1 & \frac{1}{51} \\\ 0& 1 \end{bmatrix}$ if $B=\begin{bmatrix} 1 &2\\\ -1& -1 \end{bmatrix} A=\begin{bmatrix} -1 &2\\\ 1& 1 \end{bmatrix}$ then the sum of all the elements of the matrix $∑ ^{50}_{n=1}$ Bn is Equal to

• A. 50
• B. 75
• C. 100
• D. 125

Answer 1

Answer: (C)

100

Answer 2

The correct option is(C): 100