Question

se n ( A) = 15, n ( B) = 20 e n ( A interseçao de B ) = 8. determine n ( A u B ) :

Answer 1

N ( A U B ) = n (A) + n (b) - n (A interceção B): n (A U B) = 15 + 20 - 8 n (A U B) = 27