A laboratory is testing a new steroid on mice. The average weight of a mouse that has been treated with the steroid

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A laboratory is testing a new steroid on mice. The average weight of a mouse that has been treated with the steroid is 26.8 grams and the average weight of a mouse that has not been treated with the steroid is 19.2 grams. If the average weight of all mice at the laboratory is 22.4 grams, what is the ratio of mice that have been treated to mice that have not been treated?

A) 8:13

B) 3:4

C) 8:11

D) 8:9

E) 7:9


OA C

Source: Veritas Prep