You have been told that a company increased its marketing effort from $2 million to $5 million, and that the same company increased its sales revenue from $12 million to $21 million. Calculate the company's ratio of incremental sales revenue to incremental marketing effort.

You have been told that a company increased its marketing effort from $2 million to $5 million, and that the same company increased its sales revenue from $12 million to $21 million. Calculate the company's ratio of incremental sales revenue to incremental marketing effort.



A.

3:1


B.

1:3


C.

9:1


D.

7:19



Answer: A


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