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The formula $\text{P(A or B)}$ = $\text{P(A)+P(B)}$ is correct

In every situation as long as $P(A)$ and $P(B)$ are greater than $0$.

Only when events $A$ and $B$ are disjoint.

Only when events $A$ and $B$ are independent.

Only when events $A$ and $B$ are equal to each other.

Only when events $A$ and $B$ are NOT independent.