Question 921209
Previously Posted
Re TY:  25 - 11 = 14 :)
n(A or B) = n(A) + n(B) - n(A and B)
 n(A) = n(A or B) - n(B) + n(A and B)
n(A) = 25 - 17 + 6 = {{{ highlight_green(14)}}} 
   *[illustration vennimage_11_8.png].