Given the probability of happening an event A is 0.80 and event B is 0.60.
what is The Probability of happening event A or B
my ans is 1 is it correct
There is insufficient information to answer (if $\displaystyle B \subseteq A$ then $\displaystyle P(A \vee B)=0.8$, and depending on their overlap the answer could be anything between $\displaystyle 0.8$ and $\displaystyle 1$).