What is the probability that a card drawn from a standard deck of cards is face card or a heart?

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I am quite confused about b) part. Whether to use $P(A \cup B) = P(A) + P(B) - P(A \cap B)$ Assuming P(A) is the probability of face and P(B) is the probability of heart

or just face probability is $12/52$ and heart probability is $13/52$. So = $(12/52)+(13/52)$