Question

A recipe that makes $5$ servings of hot chocolate requires $2$ squares of chocolate, $\dfrac{1}{4}$ cup sugar, $1$ cup water and $4$ cups milk. Jordan has $5$ squares of chocolate, $2$ cups of sugar, lots of water, and $7$ cups of milk. If she maintains the same ratio of ingredients, what is the greatest number of servings of hot chocolate she can make?

$5 \dfrac{1}{8}$

$6 \dfrac{1}{4}$

$7 \dfrac{1}{2}$

$8 \dfrac{3}{4}$

$9 \dfrac{7}{8}$

Solution:

We need to find which ingredient is the limiting factor.

Jordan has enough chocolate for $5\div2=\dfrac{5}{2}$ batches, enough sugar for $2\div\dfrac{1}{4}=8$ batches, and enough milk for $7\div4=\dfrac{7}{4}$ batches.

The milk is limiting, so Jordan can make $5\cdot\dfrac{7}{4}=\dfrac{35}{4}=8\dfrac{3}{4}$ servings.

Thus, D is the correct answer.

2009 AMC 8 Problem 15

Solution:

Problem 15 in Other Years