A company produces on an average 4000 items per must for the first 3 months. How many items it must produce on an average per month over the next 9 months, to average 4375 items per month over the whole?

A. 4500

B. 4600

C. 4680

D. 4710

Answer: Option A

Solution(By Examveda Team)

Required average
$$\eqalign{ & = \frac{{\left( {4375 \times 12} \right) - \left( {4000 \times 3} \right)}}{9} \cr & = \frac{{52500 - 12000}}{9} \cr & = \frac{{40500}}{9} \cr & = 4500 \cr} $$