It seems that the answer options you intended to provide are missing. To express the weight of apples Lex gave away, we need to know how much of the total weight (b pounds) she gave away.
If we denote the fraction of the apples she gave away as \( \frac{x}{y} \) (where \( x \) and \( y \) are numbers), the expression representing the weight of apples she gave away would be:
\[ \text{Weight of apples given away} = \frac{x}{y} \cdot b \]
If you provide the specific fraction or numerical options (A, B, C, D), I’d be able to identify the correct answer for you.