Question

Let A = [(1, 0, 0), (1, 1, 0), (1, 1, 1)] and B = A²⁰. Then the sum of the elements of the first column of B is 

(A) 210 

(B) 211 

(C) 231 

(D) 251

Answer 1

Answer is (C) 231

Given:

Therefore, the sum of the elements of the first column is

1 + 20 + 210 = 231