JEE Math Practice Question
Let A = $$\left[ {\begin{matrix} 1 & 0 & 0 \\ 1 & 1 & 0 \\ 1 & 1 & 1 \\ \end{matrix} } \right]$$ and B = A20. Then the sum of the elements of the first column of B is :
- A.210
- B.211
- C.231
- D.251
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