Study the following table and answer the questions.

Number of machines (in thousands) sold by dealers A, B, C, D and E during six months of 2022.

What is the ratio of machines sold by dealer B in January and average of sale of dealer A over all months?

1800 : 1789 

Sale of machines by dealer B in January = 600

Total sale of A = 620 + 640 + 628 + 635 + 430 + 625 = 3578

Average = \(\frac{3578}{6}\)

Ratio = 600  :  \(\frac{3578}{6}\) ⇒ 3600  :  3578  ⇒  1800  :  1789