Is the following statement true or false?

Consider a Venn diagram with 5 overlapping regions, with the regions labelled A, B, C, D, and E. The regions overlap in such a manner that all possible combinations of the letters occur and every region in the Venn diagram, including the area outside the circles, has the number 1 assigned to it.

The probability of an outcome that contains the letter A, given that only the regions A, B, C, D, and E are being chosen from, is 0.5.