GMAT2 Q23

[Emilyh]

Q23:
AMOUNT OF BACTERIA PRESENT
Time Amount
1:00 P.M. 10.0 grams
4:00 P.M. x grams
7:00 P.M. 14.4 grams

Data for a certain biology experiment are given in the table above. If the amount of bacteria present increased by the same fraction during each of the two 3-hour periods shown, how many grams of bacteria were present at 4:00 P.M.?

A. 12.0
B. 12.1
C. 12.2
D. 12.3
E. 12.4
Answer: A
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請問這題是選最接近正確答案的那一項嗎?
我是用14.4-10=4.4
4.4/6X2
不知道這樣子對不對?


不好意思，剛剛發現這題已經被大家討論過了，我知道怎麼算了，謝謝