Question

n (A)=5,n (B)=8,n (A intersection B)=3 ,find n (A union B)

Answer 1

n ( A U B ) = n ( A ) + n ( B )

- n ( A n B )

Given : n ( A ) = 5 n ( B ) = 8

n ( A n B ) = 3

n ( A U B ) = 5 + 8 -3

=13-3

= 10

Therefore n ( A U B ) = 10

Answer 2

Answer:

Step-by-step explanation: