Answer:
the answer is 6.
Step-by-step explanation:
solution is given in the photo
hi
let's rule ot first candidate with nothing :
as they are 4 , remains : 30 -4 = 26
Now let call X number of candidate with both degrees and diplomas
we have : 17+15 -X = 26
-X = 26 - 32
-X = -6
x = 6
We have to withdraw from categorie degree and diplomas 6 people who have both and then counted twice.
So figues goes as follow :
nothing : 4
degrees only : 11
diplomas only : 9
both degree and diplomas : 6
total : 4 +11 +9 +6 = 30
