I am plagiarizing David A. Cushman from http://www.dave-cushman.net, because it is easier for me to reformat his data, then to paste his article.
The pictures below depict a standard deep brood frame. The fullest picture depicting the maximum brood and bees suggests one side of a deep frame has roughly 1500 bees. Therefore a 10 Frame deep brood box at it's maximum would be 30,000 bees. That, of course is not the norm. This simply gives us a general idea of how many bees we are looking at when we inspect our hives.
This first picture shows about 125 sealed brood cells with about 150 bees.
Next, about 275 cells of sealed brood and roughly 300 bees.
This frames shows about 550 sealed cells and approximately 450 bees.
If a frame has 800 cells of sealed brood and 600 bees, it will look like this.
This picture is of 1100 sealed cells with a covering of 750 bees.
This shows the general appearance when a frame has 1100 cells of sealed brood. There are also 900 worker bees illustrated in this drawing.
This one indicates what a group of 1200 bees on 1400 cells of capped brood look like.
1800 cells of sealed brood will look something like this when covered by 1500 workers.