Question

chapter 'sets' all formulas ​

Answer 1

${\tt{\red{\underline{\underline{\huge{ANSWER}}}}}}$

n(AᑌB)=n(A) + n(B) -nAᑎB)

n(AᑎB)=n(A) + n(B) - n(AᑌB)

n(U)=n(Aᑌᗷ)+(n(U) - n(AᑌB)

n(A)=n(A) - n(AᑎB)

n(B)=n(B) - n(AᑎB)

$\huge\boxed{\fcolorbox{red}{red}{Thank \: You}..}$