Question

N (aub) =100 n (a)=20 n (b)=30find n a intersection b

Answer 1

Answer:

n (aUb) = n (a) + n (b) - n (a intersection b)

100 = 50 - n ( a intersection b)

n ( a intersection b) = -50

Answer 2

$\blue{ \huge{ - 50}}$

HOPE YOU HAVE GOT YOUR ANSWER