Precisely visualize sets I have three sets and I know their size and their intersection size, say :
  A size = 1000
  A intersect B size = 200
  B size = 3000
  B intersect C = 120
  C size = 5000
  A intersect C = 0 

Is that possible to visualize these sets with an Excel bubble chart precisely?
Is there any free tool for windows to visualize these sets 
Thank you for your consideration. 
 A: Following the hint of Penguin_Knight, you can try to draw it in R.
You did not specify what the intersection among A,B and C was, so I am assuming here to be zero.
library(VennDiagram)

venn.plot = draw.triple.venn(
              area1 = 1000,
              area2 = 3000,
              area3 = 5000,
              n12   = 200,
              n23   = 120,
              n13   = 0,
              n123  = 0,
                  category = c("A", "B", "C"),
                  fill = c("green", "red", "darkblue"),
                  euler.d=TRUE,
                  scaled=TRUE, ind = FALSE,
                  cat.pos=c(0,0,0))

grid.draw(venn.plot)


Unfortunately, it seems the scaled argument is not working in the VennDiagram package.
So, if by "precisely" you mean: areas proportional in size to the count values, here is another option, using the Vennerable package.
See more info here on the package and here to download it.
library(Vennerable)

Venn_object = Venn(list(A = 1:1000,B = 801:3800, C = 3681:8680))
plot(Venn_object, doWeights = TRUE)


I could not find how to rotate the chart (horizontal position).
