Question

The decimal representation of the number ${\left(1011\right)}_2$ in binary system is:

• A. $5$
• B. $7$
• C. $9$
• D. $11$

Answer 1

Answer: (D)

$11$

In decimal system ${\left(1011\right)}_2$ is written as
$1\cdot 2^3+0\cdot 2^2+1\cdot 2^1+1\cdot 2^0=8+2+1=11$
So option D is correct.