Please help with this question
So I just used n(total)=n(a)+n(b)+n(c)-n(a int b)- n(b int c) -n(c int a) +n(a int b int c)
so 12+5+7-2-3-6+x=13+x
13+x is less than or equal to 41(total number of applicants), I can't say shit about the value of x. Where am I going wrong with this approach?