CMAT 2019 Solved Question Paper

Probability of A or B = Probability of A + Probability of B - Probability of A and B.
Probability of drawing king or heart = Probability of drawing king + Probability of drawing heart - Probability of drawing kings which are hearts from the deck of cards.
A deck of cards contain 52 cards, of which there are 4 kings and 13 hearts and 1 king which is heart also.
Probability of drawing a king $=\frac{4}{52}$
Probability of drawing a heart $=\frac{13}{52}$
Probability of drawing a king which are heart also $=\frac{1}{52}$
⇒ Probability of drawing king which or heart $=\frac{4}{52}+\frac{13}{52}-\frac{1}{52}=\frac{4}{13}$