The total production of companies A and D in year 2010 is what percent of total production of four companies in the year 2012?

A. 57%

B. 55%

C. 52%

D. 61%

Answer: Option D

Solution(By Examveda Team)

In 2010, A and D
= 20 + 60
= 80
In 2012, A + B + C + D
= 20 + 50 + 20 + 40
= 130
= $$\frac{80}{130}$$ × 100
≈ 61%