In this Venn diagram, we need to find how many huts are both covered and muddy. This is represented by the intersection of the two circles labeled "Covered" and "Muddy."
In a Venn diagram, the values in the intersection represent the number of items (in this case, huts) that belong to both sets. So, to find how many huts are both covered and muddy, we look for the number in the overlap area of the "Covered" and "Muddy" circles.
From the diagram, the value in this overlapping area is 40, which means there are 40 huts that are both covered and muddy.