A card is drawn from a deck of $52$. Probability that it is a King OR a Queen is:

A card is drawn from a deck of $52$. Probability that it is a King OR a Queen is:
  1. $\dfrac{1}{13}$
  2. $\dfrac{2}{13}$
  3. $\dfrac{4}{13}$
  4. $\dfrac{1}{26}$

Solution

Kings $=4$, Queens $=4$, mutually exclusive. $P = \dfrac{4+4}{52} = \dfrac{8}{52} = \dfrac{2}{13}$.

Asked in: IMO

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