Answer
$13D$
Work Step by Step
We use the hexadecimal addition table 16.3 on page 560 to obtain:
$$
5B+E2=13D
.$$
Check, using decimals: $5B_{16}=91_{10}, \ E2_{16}=226_{10} $
$$
91+226=317, \quad 13D_{16}=1\times 16^2+3\times 16+13\times16^0= 317
.$$
