PP-T2-DS146

[emmaaqua]

At a certain refreshment stand, all hot dogs have the same price and all sodas have the same price. What is the total price of 3 hot dogs and 2 sodas at the refreshment stand?

(1) The total price of 5 sodas at the stand is less than the total price of 2 hot dogs.

(2) The total price of 9 hot dogs and 6 sodas at the stand is $21.

Ans:B

(2)條件中,只有在熱狗$1.蘇打水$2的情況下,總價才會=21--sufficient

但我總覺得...我這樣解題好像怪怪的~而且如果真的是Hotdog$1 soda$2
也不符合條件(1)的內容....

如果說真的是這樣解題的話~題目中並無說明單價是整數或是有小數點
不是嗎??

打的有點語無倫次....歹勢喔.....

[Huang Hsin-Yi]

題目問 3d+2s=?

(2) 9d+6s=21

therefore 3d+2s=21/3=7----sufficient

好便宜一定是買熱狗送汽水拉

[emmaaqua]

哈哈哈哈~~ok~!!
謝謝你嚕~!!