查理将煎饼糊倒入两种不同容量的容器中，如下图所示。 他将一半的煎饼糊倒进大容器中，另一半倒进小容器中。他把所有容器都装满了。查理使用的小容器比大容器多 24 个。

1. Determine the ratio of the number of small containers to big containers needed for the same volume.

Since half the mixture is in big containers and half in small containers, the total volume in both types of containers is the same.
Ratio of capacity of 1 big container to 1 small container = $375 : 75 = 5 : 1$.
For the same volume, the ratio of the number of big containers to small containers is $1 : 5$.

2. Use the difference in the number of containers to find the number of big containers.

Difference in ratio units = $5 - 1 = 4$ units.
$4$ units = $24$ containers.
$1$ unit = $24 \div 4 = 6$ containers.
Number of big containers = $1$ unit = $6$.

1. Find the number of big containers used (from part a)

Let $B$ be the number of big containers and $S$ be the number of small containers.
Since half the mixture is in big containers and half in small containers, the total volume in big containers equals the total volume in small containers.
$375 \times B = 75 \times S$
$S = 5B$
We are given $S = B + 24$.
$5B = B + 24$
$4B = 24 \implies B = 6$

2. Calculate the volume of half the mixture

Volume in big containers = $6 \times 375 = 2250$ ml

3. Calculate the total volume of the mixture

Total volume = $2250 \times 2 = 4500$ ml