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Q.
From a well-shuffled deck of $52$ cards, a card is drawn at random. Find the probability that the card drawn is either red or a king.
Probability
Solution:
Let $S$ denote the sample space. Then $n(S) = 52$.
Let $E =$ event of drawing a card which is either red or a king. There are $26$ red cards (including $2$ red kings) and there are $2$ more kings.
$\therefore n(E) = 26 + 2 = 28$
$\therefore P$ (getting a red card or a king) $= P(E)$
$=\frac{n(E)}{n(S)} $
$= \frac{28}{52}$
$ = \frac{7}{13}$