AMC8 2012
AMC8 2012 · Q1
AMC8 2012 · Q1. It mainly tests Ratios & proportions.
Rachelle uses 3 pounds of meat to make 8 hamburgers for her family. How many pounds of meat does she need to make 24 hamburgers for a neighborhood picnic?
Rachelle 用 3 磅肉做 8 个汉堡给家人。她需要多少磅肉来为社区野餐做 24 个汉堡？
(A)
6
6
(B)
$6\frac{2}{3}$
$6\frac{2}{3}$
(C)
$7\frac{1}{2}$
$7\frac{1}{2}$
(D)
8
8
(E)
9
9
Answer
Correct choice: (E)
正确答案：（E）
Solution
Since Rachelle uses $3$ pounds of meat to make $8$ hamburgers, she uses $\frac{3}{8}$ pounds of meat to make one hamburger. She'll need 24 times that amount of meat for 24 hamburgers, or $\frac{3}{8} \cdot 24 = \boxed{\textbf{(E)}\ 9}$.
Rachelle 用 $3$ 磅肉做 $8$ 个汉堡，所以她用 $\frac{3}{8}$ 磅肉做一个汉堡。为 24 个汉堡，她需要 24 倍的量，即 $\frac{3}{8} \cdot 24 = \boxed{\textbf{(E)}\ 9}$。
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