To find the midpoint of a given interval we have to add the upper and lower limits and divide the sum by 2.
In this case, the upper limit is 599 and the lower limit is 550, therefore the midpoint is:
[tex]\frac{550+599}{2}\text{.}[/tex]
Simplifying the above result we get:
[tex]574.5.[/tex]
Answer:
[tex]574.5[/tex]
