AMC8 2013

AMC8 2013 · Q4

AMC8 2013 · Q4. It mainly tests Word problems (algebra), Arithmetic misc.

Eight friends ate at a restaurant and agreed to share the bill equally. Because Judi forgot her money, each of her seven friends paid an extra $2.50 to cover her portion of the total bill. What was the total bill?

八个朋友在餐厅吃饭，同意平分账单。因为 Judi 忘了带钱，她的七个朋友每人多付了 2.50 美元来支付她那份总账单。总账单是多少？

(A) 120 120

(B) 128 128

(D) 144 144

(E) 160 160

Answer

Correct choice: (C)

正确答案：（C）

Solution

Since Judi's 7 friends had to pay \$2.50 extra each to cover the total amount that Judi should have paid, we multiply $2.50\cdot7=17.50$ is the bill Judi would have paid if she had money. Hence, to calculate the total amount, we multiply $17.50\cdot8=\boxed{\textbf{(C) } 140}$ to find the total the 8 friends paid.

由于 Judi 的 7 个朋友每人多付 2.50 美元来支付 Judi 应该支付的总金额，我们计算 $2.50\cdot7=17.50$ 美元是 Judi 如果有钱应该支付的账单。因此，为了计算总金额，我们计算 $17.50\cdot8=\boxed{\textbf{(C) } 140}$ 来找出 8 个朋友支付的总金额。

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