Ejercicio 1. Sean A y B sucesos de un mismo espacio muestral tales que:

P(B)=0.4 P(AUB)=0.7 P(A∩B)=0.3

Calcular: P(A^c)

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.