Question

Needed full explanation ​

Answer 1

★ Answer

→ Refer to tge attachment

Answer 2

$\huge\red{\underbrace{\overbrace{\ulcorner{\mid{\overline{\underline{ANSWER}}}}}}}$

${\bf{\green{Given, }}}$

${\bf{\red{n(x)=40}}}$

${\bf{\blue{n(XUY)=60}}}$

${\bf{\pink{n(X∩Y)=10}}}$

WKT,

${\bf{\green{n(XUY)=}}}$${\bf{\orange{n(X) +n(Y) ) }}}$${\bf{\blue{- n(X∩Y) }}}$

${\bf{\red{=>60=40+n(Y)-10}}}$

${\bf{\green{=>60=30+n(Y)}}}$

${\bf{\pink{=>n(Y)=60-30}}}$

${\bf{\blue{=>n(Y)=30}}}$

${\bf{\red{so}}}$${\bf{\blue{the}}}$${\bf{\pink{element}}}$${\bf{\green{Y}}}$${\bf{\orange{has}}}$${\bf{\blue{30}}}$${\bf{\red{elements}}}$

${\bf{\green{FOLLOW ME}}}$