Answer
$23$
Work Step by Step
$10111_{2} = ((1 \times 2^{4}) + (0 \times 2^{3}) + (1 \times 2^{2}) + (1 \times 2^{1}) + (1 \times 2^{0}))_{10} = ((1 \times 16) + (0 \times 8) + (1 \times 4) + (1 \times 2) + (1 \times 1))_{10} = 23_{10}$
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