A factory normally produces $x$ units per working day. In a month with $22$ working days, no units are produced in

A factory normally produces $x$ units per working day. In a month with $22$ working days, no units are produced in the first $y$ working days because of a strike. How many units must be produced per day on each of the rest of the working days of the month in order to have an average of $x$ units per working day for the entire month?

(A) $11x$

(B) $22x$

(C) $\dfrac{22x}{y}$

(D) $\dfrac{22x}{22-y}$

(E) $\dfrac{22x}{22xy-y}$

Answer: D

Source: Official Guide

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