Using Venn diagram,
sweaty palms = a+e+g+d
vomiting = b+e+g+f
dizziness= c+g+d+f
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Total = a+b+c+2d+2e+2f+3g which is d+e+f+2g more than the desired form of a+b+c+d+e+f+g
40%+30%+75% all show some condition = 145%
we can see that we have counted some people more than once and they add up to the extra 45%
i.e d+e+f are people counted twice and make up the 35% as given in the question
The remaining 45%-35%=10% must represent people who are triple counted or 2g=10% or g=5%
hence, d+e+f+g=40
...
Attachments![spvd.jpg]( "spvd.jpg")
spvd.jpg [ 47.68 KiB | Viewed 12 times ]
sweaty palms = a+e+g+d
vomiting = b+e+g+f
dizziness= c+g+d+f
------------
Total = a+b+c+2d+2e+2f+3g which is d+e+f+2g more than the desired form of a+b+c+d+e+f+g
40%+30%+75% all show some condition = 145%
we can see that we have counted some people more than once and they add up to the extra 45%
i.e d+e+f are people counted twice and make up the 35% as given in the question
The remaining 45%-35%=10% must represent people who are triple counted or 2g=10% or g=5%
hence, d+e+f+g=40
...
Attachments
spvd.jpg [ 47.68 KiB | Viewed 12 times ]
.jpg)
